Converters
Converters
Every converter in the AllUtil catalog — each one a real implementation with tests behind it, documented on its own page.
- 25 tools
- Runs in your browser
- No sign-up
25 tools
- Markdown to HTML ConverterConverters
Turn markdown into clean HTML — paste your source, copy the resulting markup, all in your browser.
- JSON to CSV ConverterConverters
Paste an array of JSON objects and get a clean CSV table — rows, columns and correct quoting, all converted in your browser with a copy button.
- JSON FormatterConverters
Paste your JSON below to format, validate, and beautify it instantly.
- Image to Base64 ConverterConverters
Turn any image into a base64 data URL — encode a file in your browser, without ever uploading it.
- Case ConverterConverters
Paste any identifier or phrase and see it in every case at once — camelCase, snake_case, kebab-case, PascalCase and more — then copy the one you need.
- Base64 to Image ConverterConverters
Paste a base64 string or data URL, preview the image it encodes, and download it as a file — decoded entirely in your browser.
- JSON to YAML ConverterConverters
Paste JSON, get YAML — converted in your browser with clean block formatting and a copy button.
- Text to ASCII ConverterConverters
Turn any text into its ASCII codes — see the decimal (or hexadecimal) value of every character, all locally in your browser.
- MCP Schema ValidatorConverters
Paste your MCP tool definitions to validate them against the official spec.
- HTML MinifierConverters
Minify HTML code by removing comments, collapsing whitespace, and stripping redundant attributes.
- Hash GeneratorConverters
Generate cryptographic hashes from any text using SHA-1, SHA-256, SHA-384, or SHA-512.
- JSON Schema ValidatorConverters
Paste your JSON schema to validate it for OpenAI function calling — catch errors before your API call fails.
- YAML to JSON ConverterConverters
Paste YAML below to convert it to JSON, with every value the conversion silently changed listed underneath it.
- Timestamp ConverterConverters
Convert between Unix timestamps and human-readable dates with timezone-aware display.
- JWT DecoderConverters
Paste a JWT token to decode its header, payload, and claims instantly.
- URL Encoder & DecoderConverters
Encode any string to RFC 3986 percent-encoded format or decode percent-encoded URLs back to readable text.
- Color ConverterConverters
Convert a color between HEX, RGB, and HSL, check its WCAG contrast ratio, and preview a working palette.
- Diff CheckerConverters
Paste two texts and see exactly what changed — line by line, with inline highlights.
- Regex TesterConverters
Paste a regex pattern and test string to see every match, capture group, and match position in real time.
- Curl Command GeneratorConverters
Build cURL commands for REST APIs with headers, authentication, and request bodies.
- MCP Server TesterConverters
Test MCP tool definitions with simulated calls and see what LLMs receive.
- Base64 Encoder & DecoderConverters
Encode text to Base64 or decode Base64 strings back to text instantly.
- CSV to JSON ConverterConverters
Paste a CSV table and get a clean JSON array of objects — the header becomes the keys, every row becomes an object, with a copy button and no upload.
- XML to JSON ConverterConverters
Paste XML and get structured JSON — attributes preserved under @_ keys, values left as strings, with a copy button and no upload.
- XML FormatterConverters
Paste raw or minified XML and get clean indented markup — validated as structurally well-formed, with attributes, text and comments left untouched, all in your browser.