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Developer Utilities

Developer Utilities

UUID, JWT, regex, hashes, passwords, and code helpers

7 live utilities · runs in your browser

Code Beautifier

Developer Utilities

Beautify JS, TS, JSX, TSX, JSON, CSS, SCSS, Less, HTML, Vue, Markdown, YAML, XML, SVG, GraphQL, and SQL

beautifyformat+9
AvailableOpen utility →

Code Minifier

Developer Utilities

Minify JS, TS, JSX, TSX, CSS, HTML, JSON, YAML, XML, SVG, GraphQL, and SQL

minifyjavascript+8
AvailableOpen utility →

Hash Generator

Developer Utilities

Generate MD5 and SHA digests from text locally in your browser

hashmd5+3
AvailableOpen utility →

JWT Decoder

Developer Utilities

Decode JWT header and payload locally — signature is not verified

jwtdecode+2
AvailableOpen utility →

Password Generator

Developer Utilities

Create strong random passwords locally with length and character controls

passwordsecurity+1
AvailableOpen utility →

Regex Tester

Developer Utilities

Test regular expressions with live match highlighting

regexregexp+3
AvailableOpen utility →

UUID Generator

Developer Utilities

Generate unique UUIDs instantly

uuidgenerator+1
AvailableOpen utility →

Showing 7 live utilities

About Developer Utilities

Developer Utilities collects browser-side helpers common in day-to-day engineering: identifiers and secrets, token inspection, pattern testing, hashing, and light code cleanup. Live tools include UUID Generator, Password Generator, JWT Decoder, Regex Tester, Hash Generator, Code Minifier, and Code Beautifier.

Aimed at developers and technical QA who want a quick, local utility without installing another CLI for a five-minute task.

  • UUID Generator
  • Password Generator
  • JWT Decoder
  • Regex Tester
  • Hash Generator
  • Code Minifier
  • Code Beautifier

When to use which tool

  • UUID Generator — need unique IDs (for example v4) for fixtures, keys, or test data.
  • Password Generator — need a random password or passphrase with controllable length and character sets for accounts or secrets you will store yourself.
  • JWT Decoder — inspect header/payload claims of a JWT; it decodes and displays, it does not verify signatures against your keys as a full auth library would.
  • Regex Tester — try a pattern against sample text and inspect matches/groups while writing validation or search rules.
  • Hash Generator — compute digests (such as SHA family options the tool exposes) for checksums or comparing content — not a password vault.
  • Code Minifier — remove unnecessary whitespace/comments for supported languages when you need a smaller snippet for transfer or embedding.
  • Code Beautifier — re-indent and format supported languages for readability (the inverse job of minifying).
  • JSON pretty-print alone? Prefer JSON Formatter under Text Tools. JSON↔CSV? Use Converters.

Common use cases

  • Generate a handful of UUIDs for seed data while prototyping an API.
  • Create a strong password locally before storing it in your password manager.
  • Paste a JWT from staging logs to read expiry and subject claims during debugging.
  • Iterate on a regex for form validation with live match highlighting.
  • Hash a string to compare against a documented checksum.
  • Beautify a messy SQL or JS snippet before a code review; minify when embedding a small asset.

Privacy & processing

These utilities process input in your browser. ToolsArk does not upload your passwords, JWTs, source snippets, or hash inputs to a server for the live developer tools.

That still means you should avoid pasting production secrets into any browser tool on a shared machine. Closing the tab clears page memory; downloads and clipboard contents are under your control.

Limitations

  • JWT Decoder is for inspection — treat signature verification and key management as separate, application-specific steps.
  • Minifier and Beautifier support a defined language set (see each tool); they are not full IDEs or bundlers.
  • Hashing here is for digests you request — it is not encryption or secure secret storage.
  • Browser memory and paste size still apply; enormous files may belong in local CLI tooling instead.

Tips

  • Beautify before minifying when you need to confirm logic, then minify a known-good copy.
  • Pair Regex Tester with sample strings from production-like data, not only happy-path examples.
  • Text Tools — JSON, Base64, URL encoding
  • Converters — JSON ↔ CSV

Related utilities

Explore live ToolsArk utilities related to this category.

  • JSON Formatter

    Text Tools

    Pretty-print, minify, and validate JSON in your browser

    Open Utility →
  • Base64 Encoder/Decoder

    Text Tools

    Encode and decode UTF-8 text as Base64 in your browser

    Open Utility →
  • URL Encoder/Decoder

    Text Tools

    Encode and decode URL strings

    Open Utility →
  • JSON to CSV Converter

    Converters

    Convert JSON arrays of objects into CSV with nested field flattening

    Open Utility →
  • Word Counter

    Text Tools

    Count words, characters, and paragraphs

    Open Utility →
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