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Web developer tools

Inspect, format, convert, and generate common web-development data without opening a separate development environment.

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Common tasks in this topic

Utilities for URLs, HTTP, JSON, HTML, CSS, JWT, regex, hashes, UUIDs, Markdown, SQL, and other everyday web-development tasks.

1
Parse URLs and HTTP requests
2
Format JSON, XML, HTML, SQL, and code
3
Inspect JWTs, regex patterns, hashes, and UUIDs

Tools in this topic

Choose the tool that most closely matches the task you need to finish.

Base64 encoder / decoderEncode or decode Unicode text as Base64.Convert Text, Binary, Decimal Bytes, and HexConvert between text and binary, decimal, or hexadecimal bytes.CSS clamp() generatorGenerate a fluid CSS clamp() expression from viewport and size ranges.Edit HTML and Preview the Browser ResultEdit HTML and preview the rendered browser result.Encode or Decode HTML EntitiesEncode special HTML characters or restore entity references.Format Minified HTML with Lines and IndentationAdd line breaks and indentation to compressed HTML.Format One-line SQL with Readable Line BreaksFormat one-line SQL into a more readable layout.HTTP request parser onlineParse a raw HTTP request into request line, headers and body without sending it.Inspect Unicode Code Points for TextInspect Unicode code points for text, symbols, and emoji.JSON array deduplicatorRemove duplicate values/objects from a JSON array.JSON formatter / validatorFormat, minify and validate JSON.JSON key sorterRecursively sort JSON object keys alphabetically.JWT decoderDecode JWT header and payload locally. Signature is not verified.mailto link builderGenerate a mailto link from recipient, subject and body.Markdown table generatorGenerate a Markdown table from tab- or comma-separated rows.Minify CSS, JavaScript, or HTMLCreate a smaller copy of CSS, JavaScript, or HTML.Password generatorGenerate random passwords locally with chosen character sets.Preview How Markdown Will RenderEnter Markdown and check how it will render.Regex tester onlineTest a JavaScript regular expression and inspect matches, indexes and capture groups.SHA hash generatorGenerate SHA-256 / 384 / 512 hashes locally in your browser.URL encoder / decoderPercent-encode or decode URL text.URL parser onlineParse a URL into protocol, host, port, path, query parameters and fragment.URL query parserParse URL query parameters into a readable list.URL slug generatorTurn a title or phrase into a URL-friendly slug.UUID generatorGenerate UUID v4 values in your browser.XML formatterFormat and validate XML in the browser.

Related references

Keep the relevant formats and units close while you work.

HTTP status codesOpen the related reference guideMIME typesOpen the related reference guideRegex cheat sheetOpen the related reference guideHTML & UnicodeOpen the related reference guide