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Developer Tools
Built for Speed

Fast, privacy-friendly utilities that run entirely in your browser. Format JSON, encode Base64, generate hashes, and more.

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Developer Tools

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JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting

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JSON Validator

Validate JSON syntax and find errors instantly

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Regex Tester

Test and debug regular expressions with real-time matching

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HTML Entity Encoder

Encode and decode HTML entities for safe display

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Text Tools

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Word Counter

Count words, characters, sentences, and paragraphs

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Case Converter

Convert text to uppercase, lowercase, title case, and more

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Lorem Ipsum Generator

Generate placeholder text for designs and mockups

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Text Diff Checker

Compare two texts and highlight differences

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Encoders & Converters

B64

Base64 Encoder/Decoder

Encode and decode Base64 strings instantly

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URL Encoder/Decoder

Encode and decode URL strings for safe transmission

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Timestamp Converter

Convert Unix timestamps to human-readable dates

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Color Converter

Convert between HEX, RGB, HSL color formats

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Generators

ID

UUID Generator

Generate random UUIDs (v4) for your applications

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Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes

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Password Generator

Generate secure random passwords with custom options

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QR Code Generator

Create QR codes for URLs, text, and more

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Why Choose DevTools Hub?

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Lightning Fast

All tools run in your browser. No server round-trips needed.

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Privacy First

Your data never leaves your browser. 100% client-side processing.

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Completely Free

No signup, no limits, no premium tiers. Just free tools.

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Mobile Friendly

Works perfectly on all devices - desktop, tablet, and mobile.