Your data never leaves your browser. Not now. Not ever.

Stop pasting sensitive data into tools you don't trust

24 developer tools that run 100% in your browser. No server calls, no tracking, no sign-up. Format JSON, decode JWTs, diff code — all without your data leaving your machine.

Try a Tool Free See Pro Tools — $9 Lifetime

Skeptical? Open DevTools → Network tab, then paste 10 MB of JSON into the formatter. Watch zero requests leave your browser. That’s the whole claim.

Free Tools

{ }

JSON Formatter

Format, validate, and minify JSON with syntax highlighting

B64

Base64 Encode/Decode

Encode and decode Base64 strings instantly

JWT

JWT Decoder

Decode and inspect JSON Web Tokens

#ID

UUID Generator

Generate v4 UUIDs in bulk with one click

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes

%20

URL Encode/Decode

Encode and decode URL components

/./

Regex Tester

Test regular expressions with real-time matching

CLR

Color Converter

Convert between HEX, RGB, and HSL color formats

Markdown Preview

Write Markdown and see the rendered output live

Abc

Lorem Ipsum

Generate placeholder text for your designs

UTC

Timestamp Converter

Convert Unix timestamps to dates and back with live clock

Text Case Converter

Convert between camelCase, snake_case, kebab-case, and more

Number Base Converter

Convert between binary, octal, decimal, and hexadecimal

***

Password Generator

Generate crypto-secure passwords with strength indicators

0 *

Cron Parser

Parse cron expressions with human-readable descriptions

HTML Entities

Encode and decode HTML entities for special characters

Pro Tools

Pro

+/-

Diff Checker

Compare two texts and see the differences highlighted

SQL

SQL Formatter

Format and beautify SQL queries

CSV

CSV to JSON

Convert CSV data to JSON format with proper parsing

MIN

Code Minifier

Minify HTML, CSS, and JavaScript code instantly

J>C

JSON to CSV

Convert JSON arrays to downloadable CSV files

JSON to TypeScript

Generate TypeScript interfaces from JSON data

QR Code Generator

Create QR codes for URLs, text, Wi-Fi. Full customization, download as PNG.

CRL

cURL to Code

Paste curl, get clean fetch, axios, Python requests, or Go code

Built for developers who handle sensitive data

Your data, your machine

Every tool processes data in your browser using JavaScript. We can't see your data because it never reaches us. No analytics on input, no server logs, no exceptions.

No loading, no ads, no cookie banners

Open a tool. Use it. Close it. No account walls, no “subscribe to continue” popups, no third-party scripts slowing you down.

$9 once, not $9/month

16 tools are completely free. Pro adds 8 more for a one-time payment. No subscription to forget about. No renewal surprises.

Bytes of your data sent to our servers

Tools that work offline, instantly

<1s

Average time to load any tool

One-time. Forever. All future Pro tools.

Trusted by developers who care about what happens to their data

Diff Checker, SQL Formatter, CSV/JSON converters, Code Minifier, JSON-to-TypeScript — plus every Pro tool we ship in the future. One payment. Lifetime access. 30-day money-back guarantee.

Get Lifetime Pro — $9

Price increases when we add the next batch of Pro tools.