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Developer Tools

29 free developer tools — JSON, Base64, QR codes, JWT, regex and more.

29 free tools

All Developer Tools

J
JSON Formatter
Format and validate JSON data
J
JSON Minifier
Minify JSON to save bytes
B
Base64 Encoder
Encode and decode Base64 strings
Q
QR Code Generator
Generate QR codes instantly
P
Password Generator
Generate strong secure passwords
S
SQL Beautifier
Format and beautify SQL queries
H
HTML Formatter
Beautify or minify HTML code
C
CSS Minifier
Minify or beautify CSS code
J
JS Minifier
Strip comments and minify JavaScript
U
URL Encoder/Decoder
Encode or decode URL strings
H
HTML Entities
Encode and decode HTML entities
J
JWT Decoder
Decode and inspect JWT tokens
R
Regex Tester
Test regular expressions with flags
H
Hash Generator
Generate SHA-256 and SHA-512 hashes
U
UUID Generator
Generate random UUID v4 identifiers
C
CSV to JSON
Convert CSV files to JSON format
J
JSON to CSV
Convert JSON arrays to CSV format
X
XML Formatter
Beautify or minify XML documents
M
Markdown Preview
Preview Markdown as rendered HTML
C
Chmod Calculator
Calculate file permission values
C
Cron Job Generator
Build cron expressions visually
M
Meta Tag Generator
Generate HTML meta tags for SEO
H
HTTP Status Codes
Reference for all HTTP status codes
I
Image to Base64
Convert images to Base64 data URLs
D
Diff Checker
Compare two texts line by line
I
IP Address Info
Look up IP address information
W
WiFi QR Generator
Create QR code for WiFi networks
S
Screen Resolution
Check your screen resolution and info
J
JSON to .NET DTO
Generate C# DTO classes from JSON

About Developer Tools

Developers spend a huge portion of their time on repetitive tasks — formatting JSON, encoding strings, generating UUIDs, testing regular expressions, and decoding JWT tokens. Our Developer Tools category eliminates that friction with 29 free, fast, browser-based utilities that cover the most common development workflows.

Core utilities like the JSON Formatter, Base64 Encoder, and URL Encoder/Decoder handle everyday encoding and formatting tasks. Debugging aids such as the JWT Decoder, Regex Tester, and Diff Checker speed up problem diagnosis. Code productivity tools including the SQL Beautifier, HTML Formatter, CSV to JSON converter, and Cron Job Generator save significant manual effort. Infrastructure and security tools like Hash Generator, UUID Generator, and Chmod Calculator round out the collection.

All tools work entirely in the browser — sensitive tokens, private keys, and proprietary data never leave your machine. Bookmark this category as your go-to developer toolkit for tasks that are too small to warrant a dedicated application but too fiddly to do by hand.

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