Developer
- Diagram and flowchart editor (SVG and PNG export)Place blocks, connect them with arrows, drag them around, then export to SVG or PNG.
- Mermaid diagram editor (flowcharts from text)Describe a flowchart in text (A --> B) and get the diagram live, exportable to SVG or PNG.
- Visual JSON editor with tree viewExplore, edit, add and delete JSON values in a collapsible tree.
- SQL schema diagram from CREATE TABLEPaste your CREATE TABLE statements and get a diagram with foreign keys, SVG and PNG export.
- Online code editor (JavaScript, Python, SQL, Lua, HTML)A code editor in your browser, with highlighting for 22 languages and local execution of JavaScript, HTML/CSS, Python, SQL and Lua. Nothing is uploaded.
- Button and CSS component builder (HTML + CSS code)Design a button, toggle, card, badge or input: adjust colors, radius, shadows and hover, then copy the HTML and CSS code.
- JSON to classes (TypeScript, Python, Go, Java)Paste JSON and get matching interfaces or classes.
- cURL to code (fetch, Python)Convert a cURL command to a JavaScript fetch call or Python requests.
- JSON, XML, YAML and CSS beautifier and minifierFormat or compact JSON, XML, YAML or CSS.
- HTML formatterIndent and clean up minified HTML.
- HTML minifierStrip whitespace and comments from HTML.
- XML formatterIndent and clean up minified XML.
- CSS formatterIndent and clean up minified CSS.
- CSS minifierStrip whitespace and comments from CSS.
- JavaScript formatterBasic indentation for JavaScript code.
- JavaScript minifierStrip comments and extra whitespace from JavaScript.
- SQL formatterFormat a SQL query onto readable lines.
- MD5 hash generatorCompute the MD5 hash of a text (integrity/legacy use, not for passwords).
- Regex testerTest a regular expression against text with live matches.
- CSS gradient generatorBuild a linear or radial CSS gradient and copy the code.
- CSS box-shadow generatorBuild a CSS box-shadow visually.
- robots.txt generatorGenerate a standard robots.txt file.
- .htaccess generatorCommon Apache rules: force HTTPS, www, browser caching.
- Cron expression explainerTranslate a cron expression (5 fields) into plain language.
- HTTP status codesLook up the meaning of an HTTP status code.
- URL-safe Base64 encoderEncode or decode URL-safe Base64 (used in JWTs and URL tokens).
- JSON to TypeScript interfaceGenerate a TypeScript interface from a JSON object.
- .gitignore generatorGenerate a .gitignore file for common environments.
- SHA-512 hash generatorCompute the SHA-512 (and SHA-384) hash of a text.
- CRC32 checksumCompute the CRC32 checksum of a text.
- Base32 encoderEncode a text in Base32 (RFC 4648).
- Base32 decoderDecode a Base32 string back into text.
- URL parserBreak a URL down into protocol, host, path and query parameters.
- Query string to JSONConvert a query string (a=1&b=2) into a JSON object.
- Chmod calculatorConvert Unix permissions between octal (755) and symbolic (rwxr-xr-x) notation.
- PX to REM converterConvert pixels to rem (and back) for a given base font size.
- Aspect ratio calculatorFind the ratio (16:9, 4:3...) of a size and the matching height for a new width.
- JSON escape / unescapeEscape a text for use inside a JSON string, or reverse it.
- Subnet calculator (CIDR)Compute the mask, network address, broadcast and host range of an IPv4 block.
- SVG to data URI (CSS)Encode an SVG file as a data URI ready to paste into CSS.
- File to Base64Encode any file (image, PDF, audio…) as Base64, raw or as a data URL.
- Base64 to fileRebuild a file (image, PDF, archive…) from its Base64 and download it.