All Tools

Add a prefix and/or suffix to every line. Optionally skip empty lines. Handy for bullets, quotes, SQL lists, and bulk formatting.

Convert text to decimal ASCII/Unicode code points or decode code lists back to text. Supports space, comma, or semicolon separators—runs locally in your browser.

Simplify a width and height into a ratio (like 16:9), or compute a missing width/height from a ratio and one known dimension. Runs entirely in your browser.

Generate PNG barcodes (CODE128, CODE39, EAN-13, EAN-8, UPC, and more) in your browser. Preview instantly and download—nothing is uploaded.

Encode text to Base64 or decode Base64 back to UTF-8. Useful for data URLs, API payloads, and quick debugging—runs fully in your browser.

Encode UTF-8 text as 8-bit binary strings or decode binary back to text. Useful for learning bit patterns and debugging—runs in your browser.

Calculate your Body Mass Index (BMI) using metric (kg, cm) or imperial (lb, in) units, with the standard weight category.

Design a CSS box-shadow visually: offset, blur, spread, color, opacity, and inset. Live preview and one-click copy.

Convert text between uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, and kebab-case. Handy for renaming variables, headings, and API fields—all in your browser.

Simulate protanopia, deuteranopia, tritanopia, or achromatopsia on hex color palettes or uploaded images. Preview how designs appear to color-vision-deficient users.

Convert colors between HEX, RGB, and HSL formats instantly.

Generate tints, shades, complementary, analogous, or triadic color palettes from a single base color. Copy any swatch as HEX, all locally in your browser.

Pick a color with the native swatch or type HEX, RGB, and HSL values kept in sync. Copy any format or share via URL.

Reduce PDF size in your browser. Choose structure rewrite, balanced metadata stripping, or strong JPEG page rasterization for scan-heavy files.

Check foreground and background color contrast for WCAG 2.x. See the ratio plus AA/AAA pass flags for normal and large text with a live preview.

Build a cron expression from minute, hour, day, month, and weekday fields, with a plain-English explanation. Runs entirely in your browser.

Crop images visually in your browser. Drag the selection box and handles to trim PNG, JPEG, GIF, or WebP—no upload required.

Build CSS @keyframes animations visually. Set duration, delay, easing, iteration, and keyframe steps for transform, opacity, and background-color—then copy the CSS.

Minify CSS by stripping comments and whitespace, or beautify compact CSS with indented rules — instantly in your browser.

Convert CSV to a JSON array of objects, or turn a JSON array back into CSV. Choose a delimiter, keep work local in your browser, and copy or download the result.

Paste CSV text or upload a .csv file to preview it as a table, search across every column, and copy the filtered rows as CSV or TSV. Runs fully in your browser.

Paste a curl command and get equivalent JavaScript fetch (or Axios) code, including method, headers, body, and basic auth. Runs entirely in your browser.

Find the difference between two dates, calculate age from a birth date, or add days, weeks, months, or years to a date. Runs entirely in your browser.

Remove selected pages from a PDF while keeping the rest. Runs locally in your browser.

Remove duplicate lines from a list while keeping the first occurrence of each line. Free online dedupe tool.

Pull specific pages from a PDF into a new document. Enter ranges like 1,3-5 and download locally.

Generate fake user records or JSON object arrays for prototypes and tests. Optional seed for repeatable output—no external libraries.

Create favicons in your browser from a logo or initials. Export PNG sizes, a multi-resolution .ico, and ready-to-paste HTML link tags—no upload required.

Find and replace plain text instantly in your browser. Optional case-insensitive matching. Free online find and replace tool.

Flip or mirror PNG, JPEG, GIF, or WebP images in your browser. Choose horizontal, vertical, or both axes.

Design a frosted-glass CSS card visually: blur, saturation, background tint, border, and radius. Live preview over a colorful backdrop, then copy the CSS.

Build linear or radial CSS gradients with two colors and a live preview. Copy the gradient string for your stylesheets.

Generate cryptographic digests for checksums and integrity checks using the Web Crypto API. Your text never leaves the browser.

Encode UTF-8 text to hexadecimal bytes or decode hex back to readable text. Accepts spaced, compact, or 0x-prefixed hex—runs locally.

Escape special characters to HTML entities or decode entities back to plain text. Useful when embedding snippets safely in markup—runs in your browser.

Upload an image to extract dominant colors with hex codes and percentages. Copy the palette for design work—all in your browser.

Compress images in your browser with a quality slider. Export JPEG or WebP data URLs without uploading files.

Upload PNG, JPEG, or WebP images to read format, dimensions, file size, and basic EXIF hints locally in your browser.

Resize PNG, JPEG, GIF, or WebP images in the browser. Optionally keep aspect ratio when setting dimensions.

Convert PNG, JPEG, GIF, WebP, or SVG images to Base64 and Data URI strings. Files stay in your browser.

Stamp a text watermark onto PNG, JPEG, GIF, or WebP images in your browser. Choose font size, opacity, and position—no upload required.

Turn multiple PNG or JPEG images into a single PDF with one page per image. Runs locally in your browser.

Convert JPEG photos to lossless PNG in your browser. Processing stays local with a 2 MB file limit.

Convert JPEG images to WebP with adjustable quality for smaller file sizes—all processing stays local.

Compare two JSON payloads and see which paths changed, were added, or removed. Structural diff with counts—runs locally in your browser.

Paste JSON to format, validate, and beautify it instantly in your browser. Free online JSON formatter.

Minify JSON by removing whitespace. See byte savings and copy compact output for APIs, logs, or storage—all in your browser.

Paste JSON and get clean YAML output for configs, CI files, or Kubernetes manifests—all converted locally in your browser.

Paste JSON to validate syntax instantly in your browser. See parse errors with path hints and a preview of valid payloads.

Decode a JSON Web Token’s header and payload in your browser for debugging claims and expiry. Signatures are not verified, and tokens are never uploaded or shared via URL.

Build and sign a JSON Web Token from header and payload JSON using HS256 (HMAC-SHA256) or the "none" algorithm — entirely in your browser.

Press any key to see its name, code, and modifiers, and watch a live QWERTY layout light up. Test a new or repaired keyboard entirely in your browser.

Sort lines alphabetically ascending or descending. Optionally remove duplicates while sorting. Free online line sorter.

Generate classic Lorem Ipsum placeholder paragraphs for mockups and drafts.

Preview Markdown as HTML while you type. Supports headings, lists, links, code fences, and emphasis—ideal for README drafts and docs, with no upload required.

Convert Markdown to clean HTML instantly. Supports headings, lists, links, code fences, and emphasis—copy or download the generated HTML, all locally in your browser.

Convert Markdown to a downloadable PDF in your browser. Supports headings, lists, quotes, and code blocks—no upload required.

Test your microphone and/or camera in the browser. Choose mic only, camera only, or both—live preview, mic meter, and device switching. Nothing is uploaded.

Convert letters, digits, and common punctuation to International Morse code or decode Morse back to text. Word breaks use / or |—runs in your browser.

Generate cryptographically secure, URL-friendly NanoIDs with a custom size and alphabet. Uses the Web Crypto API, entirely in your browser.

Convert numbers between bases 2–36 including binary, octal, decimal, and hexadecimal.

Generate strong, random passwords with customizable length and character sets. Runs locally in your browser.

Merge multiple PDF documents into a single file in your browser using pdf-lib. Reorder by upload sequence and download the result.

View PDF document properties including title, author, page count, and dates. All processing stays in your browser.

Render PDF pages to PNG images in your browser with pdf.js. Select a page range, preview thumbnails, and download.

Calculate what X% of Y is, what percent X is of Y, or percent change between two numbers. Free online percentage calculator.

Convert PNG files to JPEG with adjustable quality. Transparent areas are flattened to white locally in your browser.

Convert PNG to WebP with adjustable quality for smaller file sizes. All conversion runs locally in your browser.

Generate PNG QR codes from any text or URL. Adjust size, preview instantly, and download—everything runs locally in your browser.

Convert a URL query string into pretty JSON, or turn a JSON object back into a query string. Repeated keys become arrays.

Generate cryptographically strong random integers in a custom range. Free online random number generator.

Generate random strings with customizable length and character sets using crypto.getRandomValues. Ideal for tokens, IDs, and test fixtures.

Estimate how long it takes to read an article, blog post, or document based on word count and reading speed (words per minute). Runs entirely in your browser.

Try a pattern against sample text and inspect matches, indexes, and capture groups instantly. Uses JavaScript RegExp in your browser—nothing is uploaded.

Remove blank and whitespace-only lines from text. See how many lines were removed. Free online empty line remover.

Rearrange PDF pages by listing every page number once in the desired order. Processing stays in your browser.

Apply ROT13 to rotate Latin letters by 13 positions. Encoding and decoding use the same operation—handy for spoiler tags and quick obfuscation.

Rotate PNG, JPEG, GIF, or WebP images clockwise in your browser. Pick 90°, 180°, or 270° and export instantly.

Rotate all pages or a selected range in a PDF. Processing stays in your browser with pdf-lib.

Convert blog titles, product names, and headings into clean kebab-case slugs for URLs, filenames, and IDs. Instant, private, and free in your browser.

Split a PDF into individual page files or custom page ranges in your browser. Download one combined range or each page separately.

Paste SQL to format queries with line breaks before major clauses. Free online SQL pretty-printer.

Paste SVG or upload a file to strip comments, collapse whitespace, and reduce file size. Runs locally in your browser.

Paste two versions of a document, config, or code snippet and see added and removed lines at a glance. A simple line-oriented diff that stays in your browser.

Convert Unix timestamps to ISO and locale dates, or parse a date string back to epoch seconds. Supports seconds and milliseconds, plus a one-click “now” mode.

Pick a date and time, then see that exact instant across 50 popular cities worldwide—so you can schedule meetings without timezone math.

Calculate the tip amount, total bill, and cost per person. Enter the bill, tip percent, and number of people.

Trim leading, trailing, or both sides of whitespace on every line. Free online line trimmer for lists, code, and pasted text.

Escape non-ASCII characters to JavaScript \u sequences or unescape them back to readable text. Handles BMP and surrogate pairs—runs in your browser.

Convert length, weight, temperature, and data size units instantly. Metric and imperial, calculated locally in your browser.

Convert PNG, JPEG, GIF, or WebP images to PNG, JPEG, or WebP with adjustable quality. The hub for image format changes in your browser.

Percent-encode or decode URL components for query strings, path segments, and form values. Uses encodeURIComponent / decodeURIComponent in your browser.

Parse any URL into protocol, username, password, hostname, port, path, hash, and query parameters. Runs locally in your browser.

Generate one or many RFC 4122 version 4 UUIDs (GUIDs) with the Web Crypto API. Ideal for test data, primary keys, and request IDs—created locally in your browser.

Convert WebP to JPEG with adjustable quality. Transparent areas are flattened to white—all processing stays local.

Convert WebP images to PNG locally in your browser. Preserve transparency when the source WebP supports it.

Clean whitespace: collapse multiple spaces, normalize line endings, convert tabs to spaces, or strip all whitespace. Free online whitespace tool.

Paste any text to count words, characters (with and without spaces), lines, and sentences instantly. Runs fully in your browser—nothing is uploaded.

Paste XML to format and indent it instantly in your browser. Free online XML pretty-printer with syntax checks.

Paste YAML to format, validate, and beautify it instantly in your browser. Free online YAML formatter.

Paste YAML and get formatted JSON for APIs, tests, or documentation. Conversion stays local in your browser.

Paste YAML to validate syntax instantly in your browser. Free online YAML validator with clear error messages.