All Tools

A collection of free, lightweight utilities for working with data — from CSV converters to text formatters. Everything runs entirely in your browser, so your data never leaves your device.

• CSV → JSON

  Paste CSV and download JSON in your browser.

• JSON → CSV

  Paste JSON and download CSV in your browser.

• JSON Formatter & Validator

  Pretty-print, minify, and validate JSON locally.

• Base64 Encoder

  Convert text to Base64 online.

• Base64 Decoder

  Decode Base64 strings back to text.

• URL Encoder

  Percent-encode a string for safe use in URLs.

• URL Decoder

  Decode percent-encoded URLs back to readable text.

• Text Case Converter

  Uppercase, lowercase, Title Case, snake_case, kebab-case.

• UUID Generator

  Generate v4 UUIDs instantly.

• JWT Encoder

  Create signed JWTs (HS256) in your browser.

• JWT Decoder

  Inspect JWT header & payload (no network).