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Developer utilities that just work. No sign-up, 100% client-side.
Binary, hex, octal, dec
Encode & decode
Encode & decode
camelCase, snake_case, etc.
Parse PEM chains: SAN, validity, fingerprint
40+ languages
Hex, RGB, HSL, eyedropper
Parse & explain cron
Table view & export
Query, filter & dedupe
fetch / axios
Diff two curl commands
Paste curl, breakdown, send & view response
Inspect & send curl in browser
View services, ports & issues
Unified encode/decode
Visual flow diagrams
Format & validate GraphQL
Validate queries & schema
Compress & decompress
MD5, SHA-256, HMAC, Bcrypt
Hex to PDF & base64 to PDF
Encode & decode
Encode & decode
Live HTML, CSS & JS
1xx–5xx reference
Image → data URL / base64
Image tokens for OpenAI, Claude, Gemini
Convert both ways
Convert both ways
Compare two JSONs online
Escape & unescape
Pretty-print & validate
Query, filter & compare fields
Validate JSON against schema
Decode tokens
Create & sign JWT tokens
K-sortable base62 IDs
Weights + KV cache memory estimate
Pretty-print SSE / NDJSON LLM streams
Placeholder paragraphs
Preview with TOC
Diagrams & charts
JS, CSS, HTML, XML, JSON, GraphQL, SQL, YAML
Browse OpenAPI / Swagger ops, copy curl
Random, passphrase, PIN
Generate & scan
Scan QR and reveal URL
Create regex from examples
Test patterns
Fix bucket CORS errors
Unwrap protected URLs
URL-friendly slugs
Format & beautify SQL
Compare two texts side-by-side or unified
Plain text editor
Count prompt tokens vs context window
Count tokens, cost & tokens→words
Prefill vs decode latency
Format toml & TOML linter
Lexicographic sortable IDs
Encode & decode
Epoch ↔ date & UTC
Parse & encode
Short links, custom alias
Generate & format UUIDs in bulk
Validate & reformat UUID / GUID
Format, validate, minify XML
Compare two YAML files online
Pretty-print, validate, minify
Parse check with line hints
Keyboard Shortcuts
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