Tidy Code – Free Online Formatter & Validator Tools

Format, validate, convert, minify and beautify JSON, HTML, CSS, XML, YAML, Python, SQL and more. Everything runs locally in your browser.

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100% browser-based No upload to server Free to use

Quick JSON Formatter

Paste minified JSON below and format instantly in your browser.

Open full JSON tool

Why Choose TidyCode

Privacy Guaranteed

All processing happens locally in your browser. Your code and data never leave your device.

100% Free

No registration, no watermarks, and no usage counter for personal and commercial projects.

Lightning Fast

Instant results with no server queue. Format, validate, or convert in seconds.

Easy To Use

Paste or upload, click one button, copy or download. No IDE or CLI setup required.

Works Anywhere

Use on Windows, Mac, Linux, iOS, and Android browsers without installing software.

76+ Tools

Format, validate, convert, minify, and beautify JSON, HTML, CSS, XML, SQL, YAML, and more.

How to Use TidyCode

  1. 1

    Paste or Upload

    Copy your JSON, HTML, CSS, XML, or other source into the editor, or upload a local file.

  2. 2

    Format, Validate, or Convert

    Click the action button to format, validate, minify, beautify, or convert your data instantly.

  3. 3

    Copy or Download

    Copy the result to your clipboard or download the processed file for your project.

Browse All Developer Tools

76+ free developer tools available

Last updated: September 11, 2026

Format Tools

JSON Formatter JSON Formatter
XML Formatter XML Formatter
HTML Formatter HTML Formatter
SQL Formatter SQL Formatter
TypeScript Formatter TypeScript Formatter
CSS Formatter CSS Formatter
Markdown Formatter Markdown Formatter
GraphQL Formatter GraphQL Formatter
YAML Formatter YAML Formatter
Python String Formatter Python String Formatter
LaTeX Formatter LaTeX Formatter
Java String Formatter Java String Formatter
Lua String Formatter Lua String Formatter
SVG Formatter SVG Formatter
CURL Formatter cURL Formatter
TOML Validator And Formatter TOML Validator and Formatter
Docker Compose Formatter Docker Compose Formatter

Validate Tools

JSON Validator JSON Validator
Email Validator Email Validator
HTML Validator HTML Validator
YAML Validator YAML Validator
XML Validator XML Validator
CSS Validator CSS Validator
SQL Validator SQL Validator
RSS Validator RSS Validator
CSV Validator CSV Validator
UUID Validator UUID Validator
Regex Tester Regex Tester
JSONL Validator And Formatter JSONL Validator and Formatter
.env Validator And Formatter .env Validator and Formatter
JSON Schema Validator JSON Schema Validator
File Hash Checker File Hash Checker
JSON Duplicate Key Checker JSON Duplicate Key Checker
.gitignore Pattern Tester .gitignore Pattern Tester
MIME Type And File Extension Inspector MIME Type and File Extension Inspector

Convert Tools

JSON To CSV Converter JSON to CSV Converter
JSON To Excel Converter JSON to Excel Converter
JSON To SQL Converter JSON to SQL Converter
JSON To YAML Converter JSON to YAML Converter
JSON To XML Converter JSON to XML Converter
JSON To C Converter JSON to C Converter
JSON To String Converter JSON to String Converter
JSON To Table Converter JSON to Table Converter
JSON To TypeScript Converter JSON to TypeScript Converter
JSON To Dart Converter JSON to Dart Converter
JSON To HTML Converter JSON to HTML Converter
JSON To PDF Converter JSON to PDF Converter
CSV To JSON Converter CSV to JSON Converter
XML To JSON Converter XML to JSON Converter
YAML To JSON Converter YAML to JSON Converter
String To JSON Converter String to JSON Converter
Excel To JSON Converter Excel to JSON Converter
HTML To JSON Converter HTML to JSON Converter
Base64 Encoder And Decoder Base64 Encoder and Decoder
URL Encoder And Decoder URL Encoder and Decoder
Unix Timestamp Converter Unix Timestamp Converter
SRT To VTT Converter SRT to VTT Converter
VTT To SRT Converter VTT to SRT Converter
CSV To Markdown Table Converter CSV to Markdown Table Converter
Markdown Table To CSV Converter Markdown Table to CSV Converter
Query String To JSON Converter Query String to JSON Converter
JSON To Query String Converter JSON to Query String Converter
JSONPath Extractor JSONPath Extractor
JSONL To CSV Converter JSONL to CSV Converter
CSV Delimiter And BOM Normalizer CSV Delimiter and BOM Normalizer
XML To CSV Converter XML to CSV Converter
SRT And VTT To Text Converter SRT and VTT to Text Converter
Subtitle Timing Shifter Subtitle Timing Shifter
Image Metadata Remover Image Metadata Remover
Favicon And Web App Icon Generator Favicon and Web App Icon Generator
Robots.txt And Sitemap Builder robots.txt and Sitemap Builder
Cron Expression Builder Cron Expression Builder
JSON Flatten And Unflatten Tool JSON Flatten and Unflatten Tool
Duplicate Lines Remover And Sorter Duplicate Lines Remover and Sorter

Minify Tools

SQL Minifier SQL Minifier

Beautify Tools

JavaScript Beautifier JavaScript Beautifier

Free Online Code Formatting Tools for Developers

Welcome to TidyCode, a browser-based toolkit for formatting, validating, converting, minifying, and beautifying code and structured data. Explore practical tools for JSON, HTML, CSS, XML, SQL, YAML, Markdown, TypeScript, Python, and more.

The tools are free to use, require no registration, and process supported input in your browser. There are no watermarks or usage counters; browser and per-tool file-size limits still apply.

What Is Code Formatting?

Code formatting (also called beautifying or prettifying) adds indentation, line breaks, and consistent spacing so source is easy to read and debug. Minified JSON from APIs, single-line HTML templates, and compressed CSS bundles become readable in one click. A good online formatter also validates syntax so you catch errors before deployment.

Why Validate Before You Ship?

Invalid JSON breaks API integrations. Malformed HTML hurts SEO and accessibility. Bad YAML fails Kubernetes deployments. Online validators run instantly in the browser, giving line-level feedback without uploading proprietary data to third-party servers.

Developer Tool Categories

Format

Beautify and prettify JSON, HTML, CSS, XML, SQL, YAML, and more with proper indentation

Validate

Check JSON, HTML, XML, CSS, SQL, YAML, email, CSV, and UUID syntax online

Convert

Transform JSON to CSV, XML, YAML, TypeScript, SQL, HTML, PDF, and other formats

Minify

Compress JSON, HTML, CSS, JS, and SQL by removing whitespace for production

Beautify

Expand minified JSON, HTML, CSS, XML, SQL, and JavaScript with readable indentation for review and debugging

Format & Beautify

Turn minified JSON, HTML, CSS, XML, SQL, and YAML into readable, indented code with syntax-friendly layout.

Validate & Lint

Catch syntax errors in JSON, HTML, XML, CSS, SQL, YAML, email addresses, CSV, RSS, and UUID strings.

Convert Data

Move between JSON, CSV, XML, YAML, Excel, HTML, TypeScript, Dart, C, SQL, and PDF without manual scripts.

Client-Side Privacy

Every tool runs in your browser. No server upload, no storage, no account — ideal for sensitive configs and API payloads.

Who Uses TidyCode?

Software Developers

Format API responses, debug JSON configs, and prettify HTML/CSS before code review.

DevOps & SRE

Validate YAML manifests, lint JSON policies, and convert configs between formats.

Data Analysts

Convert JSON to CSV or Excel, inspect nested structures, and clean exported data.

Students & Learners

Understand JSON and XML structure with readable formatting and built-in validation.

Popular Format & Developer Tools

JSON Formatter JSON Validator HTML Formatter CSS Beautifier XML Formatter SQL Formatter YAML Formatter JSON to CSV JSON to XML JSON Minify JavaScript Beautifier HTML Validator Regex Tester URL Encoder Epoch Timestamp

Why Developers Choose TidyCode

Completely Free No subscription, trial, or export fee
No Registration Open the page and start formatting immediately
Browser Privacy Source code never uploads to our servers
No Usage Counter Run the tools repeatedly without an account or usage counter
Instant Results No queue or waiting for server processing
Many Formats JSON, HTML, CSS, XML, SQL, YAML, and more
Cross-Platform Works on desktop and mobile browsers
Built for Developers Format, validate, convert, minify, and beautify in one place

Frequently Asked Questions

What is the best free online JSON formatter?

TidyCode offers a fast, private JSON formatter that runs entirely in your browser. It formats, validates, compresses, and converts JSON without uploading data to a server — ideal for API responses and config files.

Is it safe to format code online?

Yes, when the tool processes data client-side in your browser. TidyCode never stores or transmits your input. Your JSON, HTML, CSS, and other source stays on your device.

Which formats does TidyCode support?

We support JSON, HTML, CSS, XML, SQL, YAML, Markdown, TypeScript, Python, Java, Lua, GraphQL, LaTeX, SVG, cURL, and more — plus validate, convert, minify, and beautify variants.

Do I need to install anything?

No. All tools work in modern web browsers without plugins or downloads. Bookmark pages you use often for one-click access.

What is the difference between format, beautify, and minify?

Format and beautify add indentation for readability. Minify removes whitespace to shrink file size for production. Validate checks syntax without changing layout unless errors are fixed.

Can I use TidyCode for API response debugging?

Absolutely. Paste minified API JSON into the JSON Formatter to expand structure, validate syntax, search with JSON Path, or convert to XML, CSV, or YAML.