Free Developer Tools

Fast, private, and free. Every tool runs 100% in your browser โ€” your data never leaves your machine.

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JSON Formatter & Validator

Pretty-print, validate, and minify JSON. Catch syntax errors with line numbers.

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Regex Tester

Test regular expressions live against your text. See matches highlighted instantly.

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Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text. UTF-8 safe.

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URL Encoder / Decoder

Percent-encode or decode URLs and query strings safely.

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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates in any timezone.

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Hash Generator (SHA/MD5)

Generate SHA-1, SHA-256, SHA-384, SHA-512 and MD5 hashes instantly.

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UUID / GUID Generator

Generate random UUID v4 identifiers in bulk. Multiple formats.

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Password Generator

Generate strong, secure random passwords with custom length and character sets.

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Case Converter

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.

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Word & Character Counter

Count words, characters, sentences, paragraphs and estimate reading time.

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Lorem Ipsum Generator

Generate placeholder text by paragraphs, sentences or words for mockups.

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JWT Decoder

Decode JSON Web Tokens and inspect the header and payload. Client-side only.

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Color Converter

Convert between HEX, RGB, HSL and CMYK. Pick colors and copy in any format.

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Markdown Preview

Write Markdown and see the rendered HTML live. Perfect for READMEs.

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Text Diff Checker

Compare two texts and see exactly what changed, line by line.

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Cron Expression Generator

Build and preview cron expressions with a visual interface. Includes presets.

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