CodingTool

Free · No sign-up · 50+ tools

Your Developer
Toolkit, online.

Free, fast, and practical developer tools that run instantly in your browser. JSON, encoding, hashing, time, and more.

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60+Free tools
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Formats & Domains

Transform Data

16 tools
JSON Formatter
Format and beautify JSON data
YAML ⇄ JSON Converter
Convert between YAML and JSON
CSV ⇄ JSON Converter
Convert between CSV and JSON
XML ⇄ JSON Converter
Convert between XML and JSON formats
JSON to TypeScript
Generate TypeScript interfaces
String Case Converter
Convert text case formats
Unit Converter
Developer-focused unit converter for data sizes, rates, time, and more
CSV Editor
Edit CSV files like a spreadsheet
Currency Formatter
Format currency values
Array Sorter & Shuffler
Sort and shuffle arrays and objects
YAML Viewer
View, parse, and validate YAML with tree view
Number to Words Converter
Convert numbers to words in English and Indonesian with currency and check writing support
XML to Java Class Converter
Convert XML to annotated Java classes with JAXB & Lombok support
Image to WebP Converter
Convert images to WebP format instantly in your browser
HTML to Markdown Converter
Convert HTML and webpages into clean Markdown
Screenshot to Text & Code
Extract text and code from screenshots with local OCR

Format Code

4 tools
JavaScript Beautifier & Minifier
Format or minify JavaScript
CSS Beautifier & Minifier
Format, optimize, and minify CSS code
HTML Beautifier & Minifier
Format, optimize, and minify HTML code
Markdown Editor & Previewer
Live markdown editor with preview

Validate & Inspect

9 tools
JSON Schema Validator
Validate JSON against schemas
Regex Tester
Test regular expressions interactively
Decimal Precision Calculator
Precise decimal calculations
Word Counter
Count words, characters, sentences and paragraphs instantly
Schema Markup Validator
Validate JSON-LD schema markup and rich result readiness
Source Map Stack Trace Resolver
Decode minified stack traces with source maps
Broken Link Checker & Cleaner
Find, remove, and replace dead URLs from text, files, and webpages
Internet Speed Test
Check download speed, latency, jitter, and upload availability from your browser
Open Graph Previewer
Preview social cards and debug Open Graph, Twitter Card, and HTML metadata

Compare Files

4 tools
Code Diff Checker
Compare code/text side-by-side
JSON Diff Checker
Spot every change between two JSON objects instantly
CSV Diff Checker
Compare two CSV files with key-based diff and field-level change detection
ENV Diff Comparator
Compare, audit & merge .env files with secret detection

Generate Assets

8 tools
UUID/GUID Generator
Generate unique identifiers instantly
Fake Data Generator
Generate mock data
Commit Message Generator
Generate conventional commits
Lorem Ipsum Generator
Generate placeholder text for your designs instantly
QR Code Generator
Generate QR codes instantly from URLs, text, or JSON — no backend needed
Code Screenshot Generator
Create beautiful, shareable images of your code
Gitignore Generator
Generate production-ready .gitignore files for any tech stack
GitHub Profile README Builder
Build a modular GitHub profile README with live preview

Debug APIs

3 tools
HTTP Header Parser
Parse HTTP headers
Swagger / OpenAPI Viewer
Visualize and explore OpenAPI 3.x and Swagger 2.0 specs instantly
Mini Postman (API Tester)
Test REST APIs directly in your browser — no install needed

Security & Encoding

11 tools
Base64 Encoder/Decoder
Encode and decode Base64 strings online
URL Encoder/Decoder
Encode and decode URLs safely
HTML Escape / Unescape
Encode and decode HTML entities online
MD5 Generator
Generate MD5 hash from text or files
SHA256 Hash Generator
Generate SHA256 hashes
SHA512 Hash Generator
Generate SHA512 hashes
JWT Decoder
Decode JWT tokens
Password Generator
Generate secure passwords
JWT Generator
Generate JWT tokens with HS256
ZIP with Password
Compress & encrypt files locally — no upload, no server.
Image ↔ Base64 Converter
Convert images to Base64 and decode Base64 back to images

Scheduling & Time

5 tools
Unix Timestamp Converter
Convert timestamps to dates
Timezone Converter
Convert between timezones
ISO8601 Formatter
Format and parse ISO8601 dates
Age Calculator
Calculate age from birth date
Cron Expression Generator
Build, validate, and visualize cron schedules with timezone-aware simulation