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Category18 tools

Developer Tools

JSON, encoding, hashing, and developer utilities

Showing all 18 tools in Developer Tools.
JSON Formatter
Format, validate, and beautify JSON data instantly. Free online JSON formatter with syntax highlighting, error detection, and minification.
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JSON Validator
Validate JSON syntax and detect errors instantly. Free JSON validator with line-number error reporting and syntax checking.
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JSON Diff
Compare two JSON objects and highlight differences.
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XML Formatter
Pretty-print and validate XML with configurable indentation and inline error pointing — turn a minified feed into a readable tree.
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YAML Formatter
Format, validate, and lint YAML — catch bad indentation, duplicate keys, and type mistakes before a config file bites you.
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JWT Decoder
Decode and inspect JWT tokens instantly. Free JWT decoder showing header, payload, signature, and expiry.
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JWT Inspector
Inspect a JWT’s header, payload, and signature with claim details like exp, iat, and issuer — decode and validate it without a server.
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Base64 Encode/Decode
Encode and decode Base64 strings and files instantly. Free Base64 encoder/decoder for text, images, and binary data.
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URL Encode/Decode
Encode and decode URLs and query parameters. Free URL encoder/decoder for percent encoding and special characters.
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UUID Generator
Generate UUID v4 identifiers in bulk. Free UUID generator with hyphenated, plain hex, and CSV output formats.
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Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files. Free online hash generator with verification and file checksum support.
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Regex Playground
Test and debug regular expressions with live matching. Free regex tester with capture groups, flags, and pattern templates.
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Unix Timestamp Converter
Convert between Unix epoch seconds or milliseconds and human-readable dates in your timezone, with ready-to-paste format presets.
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Lorem Ipsum Generator
Generate placeholder text for designs and prototypes. Free lorem ipsum generator with customizable word count and paragraphs.
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Color Converter
Convert between HEX, RGB, HSL, and CMYK color formats instantly. Free color converter with live preview and color picker.
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HTTP Status Lookup
Look up any HTTP status code as you parse an API response — the canonical reason phrase and when you are actually going to see it.
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MIME Type Lookup
Resolve the correct MIME type for any file extension and reverse-lookup which extensions a MIME type maps back to.
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HTTP Header Reference
A working reference for the most common request and response headers — what each does, its syntax, and the security gotchas (CSP, HSTS, CORP).
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Developer Tools — Free Online Browser Tools

Developer Tools cover the everyday essentials: format and validate JSON, decode JWTs, encode Base64 and URLs, generate hashes and UUIDs, test regex patterns, and convert timestamps and colors. Every utility runs locally in your browser, so your code samples and tokens are never transmitted to a server. Fast, private, and free for developers at any level. Debug a failing regex in the playground, diff two JSON payloads to spot the breaking change, decode a JWT to check an expiry claim, or generate a checksum to verify a downloaded artifact. Reference tables for HTTP status codes, MIME types, and common headers make this a handy desk companion for everyday engineering work.

Why Use Developer Tools on UtilixVerse?

Unlike traditional online tools that require file uploads and server-side processing, every developer tools tool on UtilixVerse runs entirely in your browser. This means your data never leaves your device, results appear instantly without network delays, and most tools work fully offline once the page loads. No accounts, no signups, and no data collection — just fast, private utilities you can trust.

Free, Private, and Always Available

All 18 developer tools tools are completely free with no premium tiers, no accounts required, and no hidden limitations. Whether you are a developer debugging code, a student working on an assignment, or a designer crafting a layout — UtilixVerse has you covered.