# Pro sound, without the studio.

Audo: pro sound without the studio. Audio and video tools, workflows, and a browser editor for you and your AI assistant: clean up, transcribe, cut, and more.

Response handling: inspect HTTP status and Content-Type before naming any response.body as media. Handle 202 jobs, 200 JSON manifests and errors with the complete client at https://audo.ai/docs/api?utm_source=markdown&utm_medium=agent#responses.

Remove noise, enhance voices, transcribe, align a script, cut, remove silence, set loudness, convert, and join audio or video files. Use each tool on the website, from ChatGPT, Claude, or a coding agent, or with one curl request. About Audo: https://audo.ai/about.md

## Tools

- [Remove noise](https://audo.ai/noise-removal.md): Turns down background noise, hiss, and hum, keeping the speaker's own voice: it filters the recording and adds nothing. Then sets the whole file to a standard loudness (−16 LUFS). Made for voices: it turns down music and other sounds too. Its other pages: [Remove background noise from video](https://audo.ai/remove-noise-from-video.md), [Isolate voice from background noise](https://audo.ai/voice-isolator.md), [Remove static, hiss, and hum from audio](https://audo.ai/remove-static.md). 5 credits a minute — $0.05/min ($3.00/hr), pay-as-you-go with no monthly subscription. Free for the first minute, 3 times a day.
  `curl -F file=@interview.wav https://audo.ai/api/try/remove-noise -D response.headers -o response.body`
- [Enhance voice](https://audo.ai/audio-enhancer.md): Rebuilds the voice, for echo, phone calls, and poor recordings: removes echo, noise, and distortion and restores muffled speech, then sets the whole file to a standard loudness (−16 LUFS). Made for voices: music and other sounds are removed too. Its other pages: [Echo remover: remove echo and reverb from audio](https://audo.ai/remove-echo.md), [AI audio cleaner: clean up audio and video](https://audo.ai/audio-cleaner.md), [Voice cleaner: clean up voice recordings](https://audo.ai/voice-cleaner.md), [Video audio enhancer: fix audio and voice in video](https://audo.ai/video-audio-enhancer.md), [AI audio fixer: repair damaged voice recordings](https://audo.ai/audio-fixer.md), [Fix muffled audio: unmuffle distant or tinny speech](https://audo.ai/fix-muffled-audio.md), [Fix distorted and clipped audio: online AI declipper](https://audo.ai/fix-distorted-audio.md), [Podcast audio enhancer: studio sound for full episodes](https://audo.ai/podcast-audio-enhancer.md), [AI microphone enhancer: make any mic sound studio-grade](https://audo.ai/mic-enhancer.md). 5 credits a minute — $0.05/min ($3.00/hr), pay-as-you-go with no monthly subscription. Free for the first minute, 3 times a day.
  `curl -F file=@voice-note.m4a https://audo.ai/api/try/enhance-voice -D response.headers -o response.body`
- [Split stems](https://audo.ai/vocal-remover.md): Separates a song or video into true stereo stems: vocals and instrumental, 4 stems (vocals, drums, bass, and other), or dialogue, background music, and sound effects. Works on video. Its other pages: [AI stem splitter: vocals, drums, bass, and other](https://audo.ai/stem-splitter.md), [AI karaoke maker and instrumental maker](https://audo.ai/karaoke-maker.md), [Remove background music from video](https://audo.ai/remove-music-from-video.md). 8 credits a minute — $0.08/min ($4.80/hr), pay-as-you-go with no monthly subscription. Free for the first 45 seconds, 3 times a day.
  `curl -F file=@song.mp3 -F stems=vocals https://audo.ai/api/try/split-stems -D response.headers -o response.body`
- [Transcribe](https://audo.ai/transcribe.md): Text with a time for every word, in 60 languages. Labels who speaks when: Speaker 1, Speaker 2, and so on. Its other pages: [Speaker diarization: transcribe with speaker labels](https://audo.ai/speaker-diarization.md), [Podcast transcription: transcribe podcasts to text](https://audo.ai/podcast-transcription.md), [Interview transcription: transcribe interviews to text](https://audo.ai/interview-transcription.md), [Create an SRT file from video or audio](https://audo.ai/srt-file-generator.md), [Text-based video and audio editor](https://audo.ai/text-based-editor.md). 3 credits a minute — $0.03/min ($1.80/hr), pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@interview.mp3 -F format=srt https://audo.ai/api/try/transcribe -D response.headers -o response.body`
- [Align a script](https://audo.ai/text-to-srt.md): Lines up a script you already have with the audio, word by word. 3 credits a minute — $0.03/min ($1.80/hr), pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@talk.mp3 -F script=@script.txt -F format=srt https://audo.ai/api/try/align-script -D response.headers -o response.body`
- [Cut](https://audo.ai/audio-cutter.md): Trims, removes, or keeps parts of a file by time. Its other pages: [Trim Video: Online Video Trimmer and Video Cutter](https://audo.ai/trim-video.md). 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first hour, 10 times a day.
  `curl -F file=@episode.mp3 -F mode=remove -F 'ranges=[[0,12.5]]' https://audo.ai/api/try/cut -D response.headers -o response.body`
- [Remove silence](https://audo.ai/silence-remover.md): Shortens long pauses. You choose how much of each pause to keep. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 3 minutes, 10 times a day.
  `curl -F file=@episode.wav https://audo.ai/api/try/remove-silence -D response.headers -o response.body`
- [Set loudness](https://audo.ai/volume-booster.md): Sets the level for where it's going: podcasts, YouTube, broadcast, or audiobooks. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 3 minutes, 10 times a day.
  `curl -F file=@episode.wav -F target=podcast https://audo.ai/api/try/loudness -D response.headers -o response.body`
- [Convert](https://audo.ai/audio-converter.md): Any format to MP3, WAV, M4A, FLAC, OGG, or Opus, including the audio from a video. Its other pages: [Convert MP4 to MP3](https://audo.ai/mp4-to-mp3.md), [Extract audio from video](https://audo.ai/extract-audio-from-video.md), [Convert M4A to MP3](https://audo.ai/m4a-to-mp3.md), [Convert WAV to MP3](https://audo.ai/wav-to-mp3.md), [Convert MP3 to WAV](https://audo.ai/mp3-to-wav.md), [Convert MOV to MP3](https://audo.ai/mov-to-mp3.md), [Convert OGG to MP3](https://audo.ai/ogg-to-mp3.md), [Convert FLAC to MP3](https://audo.ai/flac-to-mp3.md), [Convert WebM to MP3](https://audo.ai/webm-to-mp3.md), [Convert AAC to MP3](https://audo.ai/aac-to-mp3.md), [Convert MP4 to WAV](https://audo.ai/mp4-to-wav.md), [Convert M4A to WAV](https://audo.ai/m4a-to-wav.md), [Convert MP3 to OGG](https://audo.ai/mp3-to-ogg.md), [Compress audio and MP3 files](https://audo.ai/compress-audio.md), [Convert MKV to MP3](https://audo.ai/mkv-to-mp3.md). 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first hour, 10 times a day.
  `curl -F file=@episode.wav -F format=mp3 https://audo.ai/api/try/convert -D response.headers -o response.body`
- [Join files](https://audo.ai/audio-joiner.md): Puts an intro, the episode, and an outro together, in order. Its other pages: [Merge Videos: Online Video Merger and Video Combiner](https://audo.ai/merge-videos.md). 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first hour, 10 times a day.
  `curl -F file=@intro.mp3 -F file=@episode.mp3 -F file=@outro.mp3 https://audo.ai/api/try/join -D response.headers -o response.body`
- [Swap a video's audio](https://audo.ai/replace-audio-in-video.md): Puts a new soundtrack on a video. The picture is copied, so it's fast and loses nothing. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first hour, 10 times a day.
  `curl -F video=@talk.mp4 -F audio=@talk-clean.wav https://audo.ai/api/try/swap-audio -D response.headers -o response.body`
- [Media info](https://audo.ai/media-info.md): Length, format, loudness, peaks, and noise floor, so you can check before and after. Its other pages: [LUFS meter: check how loud your audio is](https://audo.ai/lufs-meter.md). Always free, 20 files a day.
  `curl -F file=@interview.wav https://audo.ai/api/try/media-info -D response.headers -o response.body`
- [Remove filler words](https://audo.ai/remove-filler-words.md): Cuts um, uh, and words said twice, in the pauses between words, keeping a natural pause. Works on video. 3 credits a minute — $0.03/min ($1.80/hr), or $0.01/min ($0.60/hr) with transcript_file_id, pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@interview.mp3 https://audo.ai/api/try/remove-fillers -D response.headers -o response.body`
- [Censor audio](https://audo.ai/bleep-censor.md): Bleep or mute swear words, slurs, and any words you list in audio or video, in place, keeping the music under them if you like. 3 credits a minute — $0.03/min ($1.80/hr), or $0.01/min ($0.60/hr) with transcript_file_id, +$0.05/min (+$3.00/hr) with keep_background, pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@vlog.mp4 -F 'words=["acme"]' https://audo.ai/api/try/censor-audio -D response.headers -o response.body`
- [Translate audio](https://audo.ai/audio-translator.md): Translate a recording into text and subtitles, keeping segment times and speakers. Its other pages: [Translate Spanish to English Audio and Video](https://audo.ai/translate-spanish-to-english-audio.md). 5 credits a minute — $0.05/min ($3.00/hr), or $0.02/min ($1.20/hr) with transcript_file_id, pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@interview.mp3 -F target_language=en -F format=srt https://audo.ai/api/try/audio-translator -D response.headers -o response.body`
- [Translate subtitles](https://audo.ai/translate-subtitles.md): Translate SRT and VTT subtitles into up to five languages, keeping their timing. Review, edit and download each language. 5 credits per 1,000 characters per language — $0.05 per 1,000 characters per language, pay-as-you-go with no monthly subscription. Free for the first 1,000 characters into up to 3 languages, 3 times a day.
  `curl -F file=@subtitles.srt -F 'target_languages=["es","de"]' https://audo.ai/api/try/translate-subtitles -D response.headers -o response.body`
- Find highlights: Rank sentence-aligned moments with titles and reasons through the API or your assistant. 4 credits a minute — $0.04/min ($2.40/hr), or $0.01/min ($0.60/hr) with transcript_file_id, pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 3 times a day.
  `curl -F file=@talk.mp3 -F count=5 https://audo.ai/api/try/find-highlights -D response.headers -o response.body`
- Shorten transcript: Select useful original speech and export its retimed transcript and cut list. 4 credits a minute — $0.04/min ($2.40/hr), or $0.01/min ($0.60/hr) with transcript_file_id, pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 3 times a day.
  `curl -F file=@meeting.mp3 -F strength=medium https://audo.ai/api/try/shorten-transcript -D response.headers -o response.body`
- [Level speakers](https://audo.ai/audio-leveler.md): Gives each speaker, or each person's track, one steady level so everyone sounds as loud, keeping music and background as they were. 2 credits a minute — $0.02/min ($1.20/hr), pay-as-you-go with no monthly subscription. Free for the first 3 minutes, 3 times a day.
  `curl -F file=@podcast.wav https://audo.ai/api/try/level-speakers -D response.headers -o response.body`
- [Mix tracks](https://audo.ai/mix-audio.md): Layers up to 20 tracks with their own volume and start, lines up tracks recorded together, and lowers music under speech. 2 credits a minute — $0.02/min ($1.20/hr), pay-as-you-go with no monthly subscription. Free for the first 3 minutes, 3 times a day.
  `curl -F file=@voice.wav -F file=@music.mp3 -F 'tracks=[{"role":"voice"},{"role":"music","volume_db":-6}]' -F duck=true https://audo.ai/api/try/mix -D response.headers -o response.body`
- [Change speed & pitch](https://audo.ai/change-pitch.md): Shifts a song or recording up or down by up to 12 semitones without changing its speed, and changes speed from 0.25x to 4x with or without keeping the pitch (slowed or sped-up versions). Works on video. Its other pages: [Speed up or slow down audio and video](https://audo.ai/change-speed.md). 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@song.mp3 -F pitch_semitones=2 https://audo.ai/api/try/speed-pitch -D response.headers -o response.body`
- [Find key & BPM](https://audo.ai/key-bpm-finder.md): Finds a song's musical key (such as A minor), its Camelot code for DJ mixing, and its tempo in BPM, with how sure it is of each. Always free. Always free, 20 files a day.
  `curl -F file=@track.wav https://audo.ai/api/try/key-bpm -D response.headers -o response.body`
- [Reverse audio](https://audo.ai/reverse-audio.md): Plays a recording backwards, end to start, for reversed effects, reverse reverb, or hidden messages. A video gives its reversed sound. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@cymbal.wav https://audo.ai/api/try/reverse -D response.headers -o response.body`
- [Mute a video](https://audo.ai/remove-audio-from-video.md): Takes the sound out of a video and keeps the picture exactly as it was, copied rather than re-encoded. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first hour, 10 times a day.
  `curl -F file=@clip.mp4 https://audo.ai/api/try/mute-video -D response.headers -o response.body`
- [Convert video](https://audo.ai/mov-to-mp4.md): Convert to MP4, WebM, or MOV, with codec and quality choices. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@clip.mp4 https://audo.ai/api/try/mov-to-mp4 -D response.headers -o response.body`
- [Compress video](https://audo.ai/video-compressor.md): Choose a file size or quality, limit resolution and frame rate, and optionally mute. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@clip.mp4 https://audo.ai/api/try/video-compressor -D response.headers -o response.body`
- [Crop video](https://audo.ai/crop-video.md): Crop, rotate, and flip video while keeping its sound. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@clip.mp4 https://audo.ai/api/try/crop-video -D response.headers -o response.body`
- [Resize video](https://audo.ai/resize-video.md): Fit or fill a ratio or exact dimensions, with zoom, position, color, or blur. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@clip.mp4 https://audo.ai/api/try/resize-video -D response.headers -o response.body`
- [Reverse video](https://audo.ai/reverse-video.md): Reverse a range or the whole clip, or make a boomerang with sound options. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@clip.mp4 https://audo.ai/api/try/reverse-video -D response.headers -o response.body`
- [Loop video](https://audo.ai/loop-video.md): Repeat a clip or reach a duration, with optional crossfades. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@clip.mp4 https://audo.ai/api/try/loop-video -D response.headers -o response.body`
- Grab a frame: Save a frame by time or frame number as PNG or JPG, at the width you choose. 1 credit per job — $0.01 per job, pay-as-you-go with no monthly subscription. Free for 10 jobs a day.
  `curl -F file=@clip.mp4 -F time_seconds=1 https://audo.ai/api/try/get-frame -D response.headers -o response.body`
- [Video to GIF](https://audo.ai/video-to-gif.md): Make an animated GIF or WebP from a video range, with frame rate, width, repeats, and a size target. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 5 minutes, 10 times a day.
  `curl -F file=@clip.mp4 -F start_seconds=1 -F end_seconds=3 https://audo.ai/api/try/video-to-gif -D response.headers -o response.body`
- [Add captions](https://audo.ai/auto-captions.md): Add styled captions to a video, with word highlights, colours, placement, and downloadable subtitle files. 4 credits a minute — $0.04/min ($2.40/hr), or $0.01/min ($0.60/hr) with transcript_file_id, pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@video.mp4 https://audo.ai/api/try/add-captions -D response.headers -o response.body`
- [Audio to video](https://audo.ai/mp3-to-mp4.md): Turn an MP3 or other recording into an MP4 audio visualizer and audiogram with a moving waveform, title and cover art. 2 credits a minute — $0.02/min ($1.20/hr), pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@podcast.mp3 -F preset=podcast_square https://audo.ai/api/try/audio-to-video -D response.headers -o response.body`
- [Add text and logo](https://audo.ai/add-text-to-video.md): Add titles, labels and a logo to a video, each placed and timed where you want it. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 10 minutes, 10 times a day.
  `curl -F file=@clip.mp4 -F logo=@logo.png -F 'overlay={"version":1,"items":[{"type":"logo","position":{"anchor":"bottom_right"},"scale":0.15,"opacity":1,"margin":0.04,"start_ms":0,"end_ms":3000}]}' https://audo.ai/api/try/add-overlay -D response.headers -o response.body`
- Plan a reframe: Get an editable crop plan before rendering a video. 1 credit a minute — $0.01/min ($0.60/hr), pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@clip.mp4 -F ratio=9:16 https://audo.ai/api/try/reframe-plan -D response.headers -o response.body`
- [Reframe video](https://audo.ai/horizontal-to-vertical-video.md): Turns horizontal video vertical (9:16), square, 4:5, or widescreen, following whoever's talking shot by shot, with every layout, crop, and keyframe editable before it's exported. 3 credits a minute — $0.03/min ($1.80/hr), pay-as-you-go with no monthly subscription. Free for the first 2 minutes, 3 times a day.
  `curl -F file=@clip.mp4 -F ratio=9:16 https://audo.ai/api/try/reframe-video -D response.headers -o response.body`
- [Text to speech](https://audo.ai/text-to-speech.md): Read a script aloud as an MP3 with Eleven v4 or Gemini 3.8, in the voice you pick, directed with tags or a style. 5 to 20 credits per 1,000 characters — $0.05–$0.20 per 1,000 characters by model, pay-as-you-go with no monthly subscription. Free for scripts up to 300 characters, 3 times a day.
  `curl -F 'text=Welcome back to the show.' -F model=eleven_v4 https://audo.ai/api/try/text-to-speech -D response.headers -o response.body`
- [Subtitles to speech](https://audo.ai/srt-to-speech.md): Read an SRT or VTT file aloud with Eleven v4 or Gemini 3.8, each line at its own time, as a voiceover or dubbed onto your video. 5 to 20 credits per 1,000 characters — $0.05–$0.20 per 1,000 characters by model, pay-as-you-go with no monthly subscription. Free for the first 300 characters, 3 times a day.
  `curl -F file=@subtitles-es.srt -F video=@clip.mp4 -F model=eleven_v4 https://audo.ai/api/try/speak-subtitles -D response.headers -o response.body`
- [Voice cloning](https://audo.ai/voice-cloning.md): Clone a voice from a short audio or video recording (or pick one of your saved voices) and generate natural MP3 speech across 30+ languages with Fish Drama 3. 12 credits per 1,000 characters — $0.12 per 1,000 characters, pay-as-you-go with no monthly subscription. Free for scripts up to 300 characters, 3 times a day.
  `curl -F file=@voice-sample.mp3 -F 'text=Welcome back to this week'\''s episode.' -F consent=true https://audo.ai/api/try/voice-cloning -D response.headers -o response.body`
- [Voice changer](https://audo.ai/voice-changer.md): Change the speaker's voice in an audio or video recording with ElevenLabs or HeyGen while keeping exact timing, pauses, and delivery. 30 credits a minute — $0.30/min ($18.00/hr), pay-as-you-go with no monthly subscription. Free for the first 15 seconds, 2 times a day.
  `curl -F file=@recording.mp3 -F model=eleven_sts_v2 -F voice=george https://audo.ai/api/try/voice-changer -D response.headers -o response.body`
- [Sound effect generator](https://audo.ai/sound-effect-generator.md): Make a sound effect from a description, such as a whoosh, an impact, footsteps, or rain, 0.5 to 30 seconds long, as an MP3 or 48 kHz WAV, looping seamlessly if you like, with ElevenLabs' SFX v3. 0.5 credits per generated second — $0.005 per generated second, pay-as-you-go with no monthly subscription. Free for sounds up to 10 seconds, 3 times a day.
  `curl -F 'text=Glass shattering on concrete' -F duration_seconds=3 https://audo.ai/api/try/sound-effect-generator -D response.headers -o response.body`
- [Voice design](https://audo.ai/voice-design.md): Describe a voice in words, hear three new voices made from it, and save the one you like to read any script, with no recording and nobody's real voice. 2 credits per job — $0.02 per job, pay-as-you-go with no monthly subscription. Free for 3 designs a day (3 previews each).
  `curl -F 'text=A warm, calm woman in her forties with a soft Irish accent, unhurried and friendly.' https://audo.ai/api/try/voice-design -D response.headers -o response.body`
- [Generate music](https://audo.ai/ai-music-generator.md): Compose royalty-free music from a description with Google's Lyria 3.5 and Lyria 3 Clip: instrumental beds, intros, jingles, or songs with your lyrics. 10 to 20 credits per job — $0.20 per job, pay-as-you-go with no monthly subscription. Free for a 30-second track a day.
  `curl -F 'text=Calm lo-fi beat with soft piano, for a study video' -F duration_seconds=60 https://audo.ai/api/try/generate-music -D response.headers -o response.body`
- [Separate sound](https://audo.ai/sound-remover.md): Remove or isolate any specific sound you describe in English, such as dog barking, footsteps, keyboard typing, applause, drums, or acoustic guitar, across audio and video with Meta SAM Audio. Returns both tracks. 25 credits a minute — $0.25/min ($15.00/hr), pay-as-you-go with no monthly subscription. Free for the first 20 seconds, 3 times a day.
  `curl -F file=@interview.mp4 -F 'sound=dog barking' https://audo.ai/api/try/separate-sound -D response.headers -o response.body`

## In the browser

- [Voice recorder](https://audo.ai/voice-recorder.md): Records from the microphone in the browser, saving as it goes, then opens the take in Audo's editor to trim, cut, clean up, and export as MP3 or WAV. Always free, no sign-up.
- [Screen recorder](https://audo.ai/screen-recorder.md): Records a screen, window, or browser tab with system sound, microphone, and an optional camera overlay in the browser, then opens it in Audo's editor to trim, clean up, caption, and export as MP4 or MP3. Always free, no sign-up.
- [Webcam recorder](https://audo.ai/webcam-recorder.md): Records video and sound from a webcam and microphone in the browser, with a mirror view and script notes, then opens it in Audo's editor to trim, clean up, caption, and export as MP4 or MP3. Always free, no sign-up.
- [Record computer audio](https://audo.ai/record-computer-audio.md): Captures sound playing in a browser tab or on the computer, with an optional microphone mix, saving as it goes, then opens it in Audo's editor to trim and export as MP3 or WAV. Always free, no sign-up.
- [Mic test](https://audo.ai/mic-test.md): Checks microphone input level and sound quality in the browser, records a short test take to play back, and opens in the editor to clean up background noise or echo. Always free, no sign-up.
- [Editor](https://audo.ai/online-editor.md): Audo's non-destructive browser editor for video and audio: cut on multitrack lanes or by transcript words, auto-cut filler words, pauses, and retakes (click any cut to restore), toggle Audio enhancer, Remove noise, or Level voices, add captions and 9:16 speaker tracking, and export once. The file stays on the person's device until one of Audo's tools runs. Always free, no sign-up.
- [Audio editor](https://audo.ai/audio-editor.md): Audo's editor for sound in the browser: cut by the waveform or by the words, turn on Audio enhancer, Remove noise, Level voices, or podcast loudness, with undo and named versions, and export MP3 or WAV. The file stays on the person's device until one of Audo's tools runs. Always free, no sign-up.

## Workflows

Several tools on one file in one request (also available via `POST https://audo.ai/api/v1/workflow-runs` and MCP `list_workflows` / `run_workflow`), free for the first part the same way.

- Clips (`clips`): Find the best moments, cut them to the frame, reframe for your platform, add captions from the original transcript, and set streaming loudness. Get MP4 clips and a JSON report with titles, reasons, scores, and source ranges.
  `curl -F file=@video.mp4 https://audo.ai/api/try/workflows/clips -D response.headers -o response.body`
- Podcast-ready episode (`podcast_ready`): Remove background noise, shorten long pauses, and set podcast loudness at −16 LUFS. Intermediate audio stays lossless, with one final MP3 encode.
  `curl -F file=@episode.wav https://audo.ai/api/try/workflows/podcast_ready -D response.headers -o response.body`
- Fix a video's sound (`fix_video_sound`): Remove background noise from a video and set its sound to −14 LUFS for streaming, keeping its picture.
  `curl -F file=@video.mp4 https://audo.ai/api/try/workflows/fix_video_sound -D response.headers -o response.body`
- [Meeting shortener](https://audo.ai/meeting-shortener.md): Shorten meeting recordings and presentations, keeping the original speech.
  `curl -F file=@meeting.mp4 -F 'options={"strength":"medium"}' https://audo.ai/api/try/workflows/meeting_shortener -D response.headers -o response.body`

## More

- All tools, by what they do: https://audo.ai/all-tools.md
- Use cases (every workflow, format conversion, and job): https://audo.ai/use-cases.md
- Guides and comparisons: https://audo.ai/guides.md

## Languages

Transcribe (`transcribe_audio`) and Align a script (`align_script`) and Remove filler words (`remove_fillers`) and Censor audio (`censor_audio`) and Translate audio (`translate_transcript`) and Find highlights (`find_highlights`) and Shorten transcript (`shorten_transcript`) and Add captions (`add_captions`) support 60 languages, detected automatically: af, ar, as, az, bg, bn, bs, ca, cs, da, de, el, en, es, et, fa, fi, fil, fr, gl, gu, he, hi, hu, hy, id, is, it, ja, kk, kn, ko, lt, lv, mk, ml, mr, ms, nb, ne, nl, or, pa, pl, pt, ro, ru, sk, sl, sv, sw, ta, te, th, tr, uk, ur, vi, yue, zh. Every other tool works on the sound, so it works in any language.

## From an assistant

Add the MCP server, https://audo.ai/mcp, and sign in. Setup for ChatGPT, Claude, Claude Duet, OpenAI Dots, Meta Muse, Grok Bot, Raycast, Claude Code, Codex, Cursor, Gemini CLI, VS Code, Copilot CLI, Antigravity, Zed, OpenCode: https://audo.ai/setup.md

Prompts to try:

- Remove the background noise from interview.wav, then transcribe it.
- Remove the long pauses from episode-12.mp3 and make it podcast-loud.
- Make SRT captions for launch-video.mp4.
- Pull the audio out of this video as an MP3.

## For agents

No key or account needed for the free part of each file. With an API key, omitting free runs the whole file with credits if the balance covers it, otherwise the free portion if quota remains. Set free=true to prohibit spending; for paid whole files use free=false with an approved positive max_credits. A free result cut short comes with finishUrl (and the Audo-Finish-Url header when the response is the file itself): give it to the person, who pays there (from $5, no sign-up), and the whole file runs; keep checking the status link, whose finishedBy names the whole-file job and its own status link.

```bash
curl -F file=@interview.wav https://audo.ai/api/try/remove-noise -D response.headers -o response.body
```

- Every tool: https://audo.ai/llms.txt
- OpenAPI: https://audo.ai/api/openapi.json
- Free and REST API docs: https://audo.ai/docs/api.md

## Pricing

Credits a minute of input: noise removal and voice enhancing 5, transcription and alignment 3, everyday tools 1, media info free. Credit packs and the free tier: https://audo.ai/pricing.md

## Questions

**Is it free?** Yes. Editing in Audo's browser editor and checking loudness are always free; convert, cut, and join are free for the first hour of a file, noise removal and voice enhancement for the first minute, and transcription for the first 2 minutes, a few times a day, with no sign-up. For longer files, you pay as you go (pay once from $5, with no monthly subscription) — from $0.01 to $0.08 a minute ($0.60 to $4.80 an hour) — see pricing.

**What happens to my files?** They stay private. Uploads are deleted after 24 hours, and free results after 1 hour.

**Which files work?** Audio as WAV, MP3, M4A, AAC, FLAC, OGG, Opus, WebM, AIFF, and video as MP4, MOV, MKV, WebM, AVI. Files up to 10 GB work without an account, and up to 10 hours when signed in. To change formats first, use Convert audio, or pull the sound from a video with MP4 to MP3 or Replace audio in video.

**Can ChatGPT, Claude, or an AI agent edit my files with Audo?** Yes. Connect Audo's MCP server to ChatGPT, Claude, Claude Code, Codex, or Cursor to clean up speech, transcribe with speaker diarization, cut filler words and pauses, or run multi-step workflows in plain words, then download the finished file or open it in Audo's browser editor to fine-tune any cut. Connect your assistant.