Developer Tools

Fast, private utilities for everyday development work. Paste, transform, read the result, and keep moving. Everything runs in your browser.

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JSON FormatterPretty-print and validate JSON. JWT DecoderInspect token headers and payloads. Base64 Encoder / DecoderConvert text to and from Base64. URL Encoder / DecoderPercent-encode or decode URL text. Hash GeneratorGenerate SHA-1, SHA-256, and SHA-512 hashes. UUID GeneratorCreate random version 4 UUIDs. Timestamp ConverterConvert Unix timestamps and dates. Regex TesterTest patterns against sample text.