Free Developer Tools

100% client-side tools for developers. No signup, no tracking, completely free.

All tools run entirely in your browser. Your data never leaves your computer.

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JSON

JSON Formatter & Validator

Format, validate, and minify JSON instantly

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Encoding

Base64 Encoder/Decoder

Encode and decode Base64 strings

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Scheduling

Cron Expression Builder

Build and validate cron schedule expressions

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Generators

UUID/ULID Generator

Generate unique identifiers instantly

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Testing

Regex Tester

Test and debug regular expressions

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Security

JWT Decoder

Decode and inspect JSON Web Tokens

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100% Private

All processing happens in your browser. Your data never touches any server.

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Instant & Fast

No loading, no waiting. Tools work instantly with no network latency.

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Free Forever

No signup, no limits, no ads. Just useful tools for developers.