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Developer tools that get out of your way

Small utilities for formatting, inspecting, and transforming data. Available tools run locally in your browser, with no account and no uploads.

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12 tools

JSON
JSON Formatter
Pretty-print JSON locally in your browser. Nothing is uploaded.
Available
JSON
JSON to TypeScript
Generate TypeScript interfaces from sample JSON objects or arrays.
Available
JSON
JSON to Zod
Turn JSON examples into Zod schemas for runtime validation.
Available
JSON
Generate Zod Schema from API Response
Paste a sample API response and generate a Zod schema for TypeScript, Next.js, Node.js, or another TypeScript project.
Available
JSON
JSON Minifier
Remove whitespace from JSON without changing its structure.
Coming soon
Data
CSV to JSON
Convert CSV rows into JSON objects with header support.
Available
Data
JSON to CSV
Export an array of JSON objects to CSV with proper escaping.
Available
Data
Base64 Encode / Decode
Encode text to Base64 and decode it back.
Coming soon
API
HTTP Status Codes
Look up what an HTTP status code means.
Coming soon
Security
JWT Decoder
Decode JWT header and payload locally. Does not verify signatures.
Available
Security
JWT Expiration Checker
Check whether a JWT is expired, not yet valid, or still inside its exp window. Time claims only — the signature is not verified.
Available
AI
Token Counter
Estimate how many tokens a piece of text will use.
Coming soon