Developer Tools
Free Browser-Based Developer Tools
A collection of free developer utilities that run entirely in your browser. No data is ever sent to a server.
- Dev Tool
JWT Decoder
Decode JWT tokens locally without sending data to any server.
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JSON Formatter
Beautify, minify, and validate JSON with indentation options.
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Base64 Encoder/Decoder
Encode and decode Base64 and Base64URL with Unicode support.
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UUID Generator
Generate cryptographically secure UUID v4 identifiers.
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Cron Expression Generator
Build and humanize standard five-field Unix cron expressions.
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Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
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URL Encoder/Decoder
Encode and decode URL components and full URIs.
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Regex Tester
Test JavaScript regular expressions with live match highlighting.
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SQL to JSON Converter
Convert SQL INSERT statements to structured JSON.
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CSV to JSON Converter
Parse CSV data into JSON with nested key support.
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