100% Client-Side & Private

Developer Tools

Fast, free, browser-based tools for developers. Format, validate, encode, decode, convert and debug data structures without leaving Fawru. No login required, all processing happens locally.

JSON Tools

Format, validate, parse, minify and convert JSON data structures client-side.

JSON Formatter / Validator

Format, validate and beautify raw JSON with detailed error reports.

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JSON Minifier

Compress and minify JSON files instantly to reduce payload size.

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JSON → TypeScript

Convert JSON structures into clean, nested TypeScript interfaces.

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JSON → Python Pydantic

Convert JSON payloads into modern Python Pydantic models.

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JSON → SQL Insert

Convert JSON array data objects to safe SQL insert statements.

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JSON Diff

Compare two JSON payloads structurally to view exact differences.

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Encoding & Security

Securely encode, decode, and parse tokens, URLs and binary values.

JWT Decoder

Decode headers, payload claims, and dates from JSON Web Tokens.

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Base64 Encoder / Decoder

Convert binary/text strings to and from Base64 Unicode encoding.

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URL Encoder / Decoder

Safely encode and decode special characters in web URL strings.

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Utilities & Lookups

Generate mock data, convert timestamps, and lookup HTTP reference protocols.

UUID Generator

Generate cryptographically secure v4 UUIDs individually or in bulk.

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Timestamp Converter

Convert Unix seconds and milliseconds back and forth to dates.

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HTTP Status Lookup

Browse, filter and search code classes and explanations.

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