Are security utilities private?

Yes. These tools run in the browser and do not upload pasted text to HappyFormatter servers.

Can I use these tools for sensitive snippets?

The tools are designed for local browser processing, but you should still avoid pasting secrets into any web page unless your organization allows it.

HappyFormatter Local code tools

Browse tools

Tool category

Security Utilities

Decode JWTs, generate hashes, and inspect encoded text locally in your browser. HappyFormatter does not upload your input.

JWT Decoder

Decode JWT headers and payloads locally in your browser. Inspect token claims without uploading the token.

Open tool

Hash Generator

Generate SHA-256, SHA-1, SHA-384, and SHA-512 hashes locally in your browser with no upload.

Open tool

Web

5 families

HTML

Markup

Format HTML

CSS

Stylesheet

Format CSS Minify CSS

JavaScript

Browser script

Format JavaScript Minify JavaScript Format with Biome Minify with Biome

TypeScript

Typed script

Format TypeScript Minify TypeScript Format with Biome Minify with Biome

SCSS

Stylesheet

Format SCSS Minify SCSS

Data

7 families

JSON

Structured data

Format JSON Minify JSON

XML

Structured markup

Format XML Minify XML

YAML

Config data

Format YAML

TOML

Config data

Format TOML

SQL

Query language

Format SQL

Proto

Schema

Format Proto

Markdown

Document

Format Markdown

Runtime

7 families

Python

Application code

Format Python Format with Ruff

PHP

Server script

Format PHP Format with Mago

Go

Application code

Format Go

Dart

Application code

Format Dart

Java

Application code

Format Java

Lua

Script

Format Lua

Rust

Systems code

Format Rust

Systems

5 families

C

Native source

Format C

C++

Native source

Format C++

C#

.NET source

Format C#

Objective-C

Apple source

Format Objective-C Format Objective-C++

Zig

Systems code

Format Zig

Utilities

5 families

JSON Tools

JSON

JSON Viewer JSON Sort Keys JSON Diff

Web Encoding Tools

Web

Base64 Encode/Decode Regex Tester URL Encoder/Decoder

Data Converters

Converters

JSON to YAML YAML to JSON JSON to CSV XML to JSON

Security Utilities

Security

JWT Decoder Hash Generator

Color Tools

Colors

Color Converter