json
JSON Formatter
Format and beautify JSON
Format JSON, encode Base64, generate UUIDs, check JWT tokens, convert colours - 100+ tools in a single, searchable workspace.
Every tool runs entirely in your browser. No data ever leaves your device.
Popular tools
Fast access to the most useful formatters, encoders, validators, and converters without loading the full library on the homepage.
json
Format and beautify JSON
json
Validate JSON input
base64
Encode text to Base64
base64
Decode Base64 to text
jwt
Decode JWT payload
regex
Test a regex pattern from line 1 against the remaining text
uuid
Generate a UUID
url
Encode text for URLs
url
Decode URL-encoded text
sql
Format SQL queries for easier reading
csv
Convert CSV data into a JSON array
xml
Format and beautify XML with proper indentation
All-in-one toolkit
FreeToolkit brings together essential browser-based utilities in a single place so you can format payloads, decode strings, validate data, generate values, and move through small development tasks without switching between slow or cluttered tools.
Whether you are checking API responses, cleaning input, transforming structured data, or generating quick development helpers, the toolkit is designed to stay fast, readable, and useful across mobile and desktop screens.
Move from formatting and validation to conversion and generation without leaving the same clean workspace.
Most tools run directly in the browser, helping you work faster while keeping common utility tasks local.
Responsive pages, focused layouts, and direct tool access keep friction low on desktop and mobile.
FAQ
Quick answers for visitors who want to understand how the library works before diving into the full tool collection.
Most tools are designed to run directly in the browser for fast, practical workflows such as formatting, validation, encoding, decoding, and lightweight conversion tasks.
Yes. The All Tools page groups the full library into one searchable and filterable view so you can quickly find the exact utility you need.
Yes. The homepage, All Tools page, and individual tool pages are built with responsive layouts so the interface stays readable and usable across screen sizes.
The library includes utilities for JSON, Base64, JWT, regex, UUID, URL handling, password and hash workflows, SQL, CSV, XML, YAML, CSS, text processing, and more.