Text
Format JSON, YAML, XML, SQL, CSV, TSV, and PSV. Search, replace, convert, and inspect text quickly.
Free online developer tools
m3utilities gives you online text tools, regex tools, encoding tools, conversion tools, image tools, audio tools, math tools, time tools, geo tools, and QA test data tools in one place.
Regex Tools
Build and test regex patterns with live helper text, presets, and generated sample data.
Encoding Tools
Encode and decode URL, HTML, Base64, JWT, and Morse data in the browser.
Conversion Tools
Convert temperature, distance, storage, time, speed, weight, and more.
Image
Edit images online with OCR, crop, rotate, resize, draw, cartoon overlays, and download features.
Audio
Use browser audio features for text to speech, speech to text, tone generation, spectrum analysis, and recording.
Text Games
Try hangman-style pattern matching and anagrams powered by a built-in dictionary.
More Tools
Use math, time, geo, QA, and car tools, then create an account for notes, standups, todos, and synced files.
Built for developers, QA, and implementors
These pages are crawlable public tool pages with direct links, making them easier to discover and share. Create an account if you want workspace features like notes, standups, to-do lists, file tools, and premium API access.