JSON Formatter
Format, validate, minify and inspect JSON without sending it to a server.
Open tool →BROWSER UTILITIES
Developer tools
Focused utilities for everyday development work. Every Phase 1 tool processes its input in your browser—no account or upload required.
JSON Compare
Compare two JSON documents and clearly highlight structural and value changes.
Open tool →JWT Decoder
Inspect JWT headers, payloads, claims and expiry information locally.
Open tool →GUID Generator
Generate one or many UUIDs with practical formatting options.
Open tool →Base64 Encode & Decode
Encode or decode text in Base64 directly in the browser.
Open tool →Need something else?
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