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Developer Tools
That Just Work

Access 213+ premium utility tools for text processing, encoding, code formatting, and more. All free, all in your browser.

Browse by Category

Structured toolsets for specific workflows.

article

Text

Transform, count, sort & analyze text

17 Tools
lock

Encoding

Encode & decode Base64, URL, hex & more

16 Tools
code

Developer

JSON, SQL, HTML, regex & code tools

65 Tools
bolt

Generators

Passwords, UUIDs, colors & placeholders

36 Tools
transform

Converters

Convert between formats, units & bases

34 Tools
dns

Network

DNS lookup, IP info & HTTP headers

8 Tools
calculate

Math

Calculators, primes, Fibonacci & more

11 Tools
enhanced_encryption

Crypto

AES, HMAC, Caesar & Vigenere ciphers

4 Tools
image

Image

Resize, crop, compress & convert images

10 Tools
data_object

Formatters

Format JS, CSS, Python & SQL code

4 Tools
api

API

Test APIs & inspect HTTP headers

2 Tools
checklist

Productivity

Notepad, color picker & Markdown editor

6 Tools

Popular Tools

The most used utilities by our community.

data_object

JSON Formatter

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Format, validate & minify JSON data

pin

Base64

star

Encode and decode Base64 strings

palette

Color Converter

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Convert between HEX, RGB, and HSL

fingerprint

Hash Generator

star

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

123

Word Counter

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Count words, characters & sentences

password

Password Generator

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Generate secure random passwords

Discover All 213+ Tools
Privacy First

Your data never leaves your browser.

shield

Local Processing

All tools process your data locally in the browser. Zero server uploads.

delete_forever

No Data Stored

Nothing is logged or stored. Your data exists only in your session.

213+
Free Tools
100%
Free of Charge
100%
Client-Side
12
Categories

Frequently Asked Questions

Are the tools really free?

Yes. All tools on FreeTools.one are completely free with no premium tiers, usage limits, or hidden costs. We cover operating costs through minimal advertising.

Is my data safe?

Yes. Every tool processes data locally in your browser using client-side JavaScript. Your data is never uploaded to any server, logged, or stored.

Do I need to create an account?

No. All tools are available immediately without any registration, login, or email address. Just open a tool and start using it.

What tools are available?

FreeTools.one offers 213+ developer tools across 12 categories including JSON formatting, Base64 encoding, hash generation, QR codes, regex testing, image processing, and more.

Do the tools work on mobile?

Yes. All tools are fully responsive and work on desktop, tablet, and mobile devices with any modern browser.

Why Choose FreeTools.one?

FreeTools.one is the go-to collection of free developer utilities used by thousands of developers, designers, and content creators worldwide. Our tools are designed for speed, privacy, and simplicity.

Unlike other tool sites that require accounts, limit daily usage, or upload your data to remote servers, FreeTools.one processes everything locally in your browser. This means your sensitive code, API keys, passwords, and personal data never leave your device.

With 213+ tools spanning text processing, encoding, code formatting, generators, converters, network diagnostics, cryptography, image processing, and more — FreeTools.one replaces the dozen browser tabs and desktop apps developers typically rely on.

Developer Blog

Tutorials, guides, and tips for developers. Learn about JSON, Base64, regex, SEO, and more.

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