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A comprehensive collection of 500+ free developer tools for JSON formatting, encoding, security analysis, date conversion, CSV parsing, SQL formatting, and more. Format, convert, encode, and validate everything from JSON to SQL — no sign-up, no ads, no cost. Ever.

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JSON Formatter — techfixgen.com
{ "user": { "name": "Ada", "role": "Admin" } }
{
  "user": {
    "name": "Ada",
    "role": "Admin"
  }
}
Toolkits

Everything, organized by purpose

Six focused toolkits covering the everyday data workflows of modern developers.

JSON
4 tools
Format, validate, compare, and transform JSON data.
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Encoding
3 tools
Encode and decode Base64, URL, HTML, and more.
Explore Encoding
Security
4 tools
Hash passwords, generate tokens, and audit configurations.
Explore Security
Date & Time
4 tools
Convert timestamps, format dates, and calculate durations.
Explore Date & Time
CSV
3 tools
Parse, convert, and manipulate CSV data.
Explore CSV
SQL
3 tools
Format, minify, and visualize SQL queries.
Explore SQL
Popular

The tools developers use most

The most-visited utilities in the TechFixGen catalog, all free and running entirely in your browser.

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Why TechFixGen

Built for people who think in data

From a quick timestamp conversion to a full JSON pipeline, TechFixGen is the set of utilities we wished existed.

Ridiculously fast

All processing happens in your browser. Zero server round-trips means results are instant — even for 100 MB files.

Private by design

Your data never leaves your device. No uploads, no accounts, no tracking. Close the tab and it's gone.

One consistent surface

Every tool shares the same layout, shortcuts, and editor so you never have to relearn a workflow.

Works offline

Your favorite tools keep working even without a connection, with automatic offline caching built in.

Keyboard first

Navigate the whole catalog and run tools without touching the mouse. Press / to search from anywhere.

Free, forever

No tiers, no paywalls, no sign-ups. Every tool, every feature, at its full power, always.

21+

Production tools

6

Focused toolkits

100%

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Work with data like it's nothing

Jump straight into one of the most-used tools, or start browsing the entire catalog.

JSON FormatterJSON CompareBase64 Encoder & Decoder