all tools / developer

37 free developer tools

Format JSON, decode JWTs, test regex, convert timestamps and more. Runs locally in your browser.

• json formatter paste json to pretty-print or minify it
• json validator paste json to check whether it is valid and see where the first error is
• json to csv paste a json array and get a csv you can open in excel or google sheets
• csv to json paste csv with a header row and get a json array of objects
• json to yaml paste json and get readable yaml for config files
• yaml to json paste yaml and get valid json
• xml formatter paste xml to pretty-print it with consistent indentation or minify it
• sql formatter paste a sql query and pick a dialect to get readable, indented sql
• html formatter paste html to get cleanly indented, readable markup
• css formatter paste minified or messy css and get clean, indented rules
• javascript beautifier paste minified or messy javascript and get tidy, indented code
• css minifier paste css to strip comments and whitespace and shrink file size
• javascript minifier paste javascript and get a smaller, minified version powered by terser
• html minifier paste html to remove comments and collapse whitespace
• base64 encode & decode convert text to base64 and back
• url encode & decode percent-encode text for urls or decode encoded strings back to text
• html entities encoder escape text for html or turn entities like & back into characters
• jwt decoder paste a jwt to read its header, payload and expiry
• regex tester type a pattern and test text to see highlighted matches and capture groups live
• cron expression generator build a cron schedule or paste one to read it in plain english with upcoming run times
• uuid generator generate random v4 or time-ordered v7 uuids in bulk
• unix timestamp converter convert epoch time to a readable date and back, with a live current timestamp
• number base converter enter a number in any base and see it in binary, octal, decimal, hex and more
• css gradient generator design a gradient with live preview and copy the css
• box shadow generator tune shadows with sliders and copy the css box-shadow
• border radius generator adjust each corner and copy the css border-radius
• clip path generator drag points to shape a polygon and copy the clip-path css
• color converter enter a color in any format and get hex, rgb, hsl and oklch values
• chmod calculator tick permissions to get the octal number, symbolic form and chmod command
• user agent parser paste a user-agent string or use yours to see the browser, os and device
• gitignore generator pick languages and tools to build a .gitignore you can copy or download
• json to typescript paste json and get typescript interfaces generated from its structure
• markdown table generator edit a grid and copy a neatly aligned markdown table
• http status codes search every http status code and what it means
• meta tag generator fill in your page details and copy the html head tags
• string escape & unescape escape special characters for code or turn escape sequences back into text
• query string parser paste a url or query string to see each parameter, edit it and rebuild the link