All Tools About Blog MCP Server — Use tools from AI agents
Workflows Paste Anything — Smart Detector Tool Pipeline Builder Bulk / Batch Processor
JSON Tools JSON Formatter & Beautifier JSON Validator JSON to CSV Converter JSON to TypeScript Generator JSON to Python Converter JSON Flatten & Unflatten jq Playground — JSON Processor JSON Mock Data Generator JSON Schema Validator JSONPath Evaluator JSON Schema Generator JSON Patch / Diff Generator
Encoding Tools Base64 Encoder / Decoder URL Encoder / Decoder Hash Generator (MD5/SHA) JWT Decoder HTML Entity Encoder / Decoder Image to Base64 Converter String Escape / Unescape Tool ASCII / Binary / Hex Converter Protobuf Decoder — Wire Format Viewer Encoding Detective — Mojibake Repair
Formatters HTML Beautifier XML Formatter & Validator SQL Formatter & Beautifier CSS Minifier & Beautifier JavaScript Minifier & Beautifier TOML Formatter & Converter YAML Formatter, Validator & Minifier
Generators UUID Generator Password Generator QR Code Generator Lorem Ipsum Generator Cron Expression Generator chmod Calculator Slug / URL Generator .gitignore Generator
Testing Tools Regex Tester Regex Explainer — Plain English
Security Tools HMAC Generator Content Security Policy Generator SSH Key Generator SSL Certificate Decoder CORS Header Builder & Generator
Design Tools Color Picker & Converter Placeholder Image Generator SVG Path Editor & Visualizer
Comparison Tools Diff Checker / Text Compare .env Diff & Merge
Converters JSON-YAML Converter Epoch / Unix Timestamp Converter Markdown to HTML Preview Curl to Fetch/Axios Converter Tailwind CSS Converter OpenAPI to TypeScript Text Case Converter Number Base Converter CSV Viewer & Editor Date & Time Format Converter SQL to MongoDB & N1QL Converter Semver Calculator & Comparator Byte / Size Calculator URL Parser & Builder Glob to Regex Converter Math Expression Evaluator SQL DDL to TypeScript Converter Duration / Time Calculator CSS Unit Converter — px, rem, em, pt, vw, vh JSON to Go Struct Converter HTML to Markdown Converter CSV to SQL Converter SQL to ORM Converter
Reference HTTP Status Code Explorer Git Command Builder GraphQL Schema Explorer MIME Type Lookup
Text Tools Word & Character Counter Text Line Sorter, Deduplicator & Tools
Networking Tools Subnet / CIDR Calculator
DevOps Tools Nginx Config Generator Docker Compose Validator Robots.txt Generator & Validator GitHub Actions YAML Validator

About CodeTidy

CodeTidy is a free collection of 86+ online developer tools built for speed, privacy, and simplicity. Whether you need to format JSON, encode Base64, test a regular expression, decode a JWT, generate a UUID, or convert a SQL schema into TypeScript, every tool runs entirely in your browser — your data is never uploaded to or processed on a server.

What We Build

Developers reach for the same small utilities dozens of times a day: pretty-printing a minified API response, checking whether a config file is valid, hashing a string, or working out what a cron expression actually means. Most of these tasks are quick — but hunting for a trustworthy, fast, ad-light tool to do them is not. CodeTidy exists to be that reliable default: open the page, paste your data, get your answer, and move on.

Our tools are organised into 14 categories, including JSON tools, encoding and decoding utilities, code formatters and beautifiers, data converters, generators, and quick-reference lookups. New tools are added regularly based on what developers actually search for and request.

Why CodeTidy?

How It Works

Each tool is a small, self-contained component that runs in your browser using native web APIs — JSON.parse, the Web Crypto API, TextEncoder, the URL API, and similar building blocks — alongside a few well-audited open-source libraries where needed. Because the logic ships to your browser and executes there, the tools keep working even on a flaky connection, and nothing you paste is ever transmitted back to us.

How CodeTidy Is Funded

CodeTidy is free to use and funded by unobtrusive display advertising. Ads let us keep every tool free and signup-free while covering hosting and development. We deliberately keep ad density low and never place ads inside the tool workspace itself. See our Privacy Policy for details on how advertising and analytics work.

Contact

Have feedback, a bug report, or a tool request? We'd genuinely like to hear it — reach out at [email protected] or visit our contact page.

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