Json Tools Documentation

A comprehensive developer guide detailing our local-first, privacy-first conversion dashboard.

All Tools

Jump directly to any utility. Every tool runs in your browser with no login required.

JSON Formatter
Format, beautify, and prettify raw JSON code with custom spacing options.
JSON Validator
Validate JSON syntax, find missing commas or brackets, and locate errors in real-time.
JSON Viewer
Explore large JSON structures interactively with an expandable tree view and search.
JSON Diff
Compare two JSON objects side-by-side and highlight structural or value differences.
JWT Decoder
Decode JSON Web Tokens (JWT) client-side to inspect headers, payload, and signature status.
Base64 Encoder
Convert text or binary data into Base64 format securely.
Base64 Decoder
Convert Base64 formatted strings back into readable text format.
Regex Tester
Test regular expressions with real-time match highlighting, details, and substitution.
UUID Generator
Generate cryptographically secure UUIDs (v4) individually or in bulk.
Image Converter
Convert, resize, and optimize images to JPG, PNG, WEBP, AVIF, and other formats client-side.
SQL Formatter
Beautify SQL queries for MySQL, PostgreSQL, SQLite, and standard SQL dialects.
String Escaper
Escape or unescape text for JSON, HTML, URL, and Javascript string literals.

1. Architecture Overview

Json Tools runs entirely inside your browser sandbox. Unlike other tool suites, we perform all parsing, formatting, and cryptography in local JavaScript.

Zero Server Hits

Payload data is never transmitted across the network, resolving client confidentiality or compliance conflicts.

Offline Functionality

Once loaded, the tools continue running even if your network connection drops. Ideal for offline coding work.

Hybrid UI Engine

Upgrades smoothly from lightweight textareas on mobile viewports to Monaco Editors on desktops.

2. JSON Utility Suite

The JSON suite includes four separate editors tailored for handling object notations:

  • JSON Formatter: Cleans raw payloads using 2-space, 4-space, or tab formats. Includes a minification toggler.
  • JSON Validator: Verifies syntax conformance against RFC 8259 specs with line and column error reporting.
  • JSON Viewer: Parses objects into an expandable tree hierarchy with a live key/value search filter.
  • JSON Diff: Compares two objects using a side-by-side diff view with change highlighting.

3. JWT & Cryptography

  • JWT Decoder: Splits JSON Web Tokens into header and payload segments with expiry checks.
  • Base64 Encoder / Decoder: Encodes and decodes text with full UTF-8 Unicode support.

4. Regular Expressions, SQL & Text

  • Regex Tester: Highlights matches, capture groups, and match indices in real time.
  • SQL Formatter: Reorganizes raw SQL with standardized keyword casing and indentation.
  • UUID Generator: Creates cryptographically secure UUID v4 values in single or bulk mode.
  • String Escaper: Escapes and unescapes text for JSON, HTML, URL, and JavaScript literals.

5. Image Utilities

6. Frequently Asked Questions

How do I verify that my data is not uploaded?

Open your browser's Developer Tools (F12), go to the Network tab, paste data into an editor, and run the tool. No HTTP requests are triggered by formatting or conversion actions.

Does this support dark mode?

Yes. Json Tools uses a dark-first design natively, with carbon backgrounds and editor color palettes tuned for long sessions.

Need support or want to suggest new converters? Contact us at ops.devsupport@gmail.com or return to the Home Page.