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The Complete Free Toolbox

Browse the complete category structure, then open a focused subcategory or a specific tool directly. Categories include structured data, code & web, text, security, media, and date/time.

Structured Data Tools

Comprehensive collection of free browser-based tools for formatting, validating, comparing, querying, and converting JSON, XML, YAML, and CSV data — every tool runs entirely in your browser with no uploads, no sign-ups, and no server processing required.

18 tools

JSON & XML Formatters1 tools JSON Processing4 tools JSON Validation1 tools JSON Tree Viewer1 tools JSON & Text Diff1 tools JSONPath Tester1 tools JSON Key Extractor1 tools JSON Converters3 tools XML Formatter1 tools XML & YAML Validators2 tools YAML Formatter1 tools CSV Tools1 tools

Code & Web Tools

Comprehensive collection of free browser-based tools for Base64 and URL encoding, HTML and CSS formatting, Markdown preview and statistics, and regex validation — everything runs locally without uploads, accounts, or server processing.

13 tools

Base64 & URL Encoders2 tools Base64 & URL Decoders1 tools Base64 File Converter1 tools URL Encoding1 tools HTML Formatter2 tools Markdown Preview1 tools Markdown Statistics1 tools CSS Formatter1 tools Regex, URL & Email Validators3 tools

Text Content Tools

Comprehensive collection of free browser-based text tools for comparison, word counting, slug generation, case conversion, line sorting, and duplicate removal — everything runs locally without uploads or accounts.

7 tools

Text Comparison Tools1 tools Placeholder Text Generator1 tools Slug Generator1 tools Word Counter1 tools Case Converter & Line Sorter2 tools Duplicate Line Remover1 tools

Security & Identity Tools

Comprehensive collection of free browser-based security tools for password generation, hash calculation, HMAC computation, JWT inspection, UUID and NanoID creation, and password strength analysis — all running locally.

9 tools

Password Generators1 tools Hash & HMAC Generators2 tools JWT Inspector1 tools JWT Validator1 tools UUID & NanoID Generators2 tools Password Strength Checker1 tools HMAC Generator1 tools

Media & Files Tools

Comprehensive collection of free browser-based media tools for color conversion, QR code generation and scanning, image compression, resizing, and PDF creation — everything runs locally without uploads.

7 tools

Color Converters1 tools QR Code Generator1 tools QR Code Scanner1 tools QR Code Decoder1 tools Image Compressor & PDF Creator2 tools Image Resizer1 tools

Date, Time & Math Tools

Comprehensive collection of free browser-based date, time, and math tools for Unix timestamp conversion, unit conversion, date difference calculation, and percentage computation — everything runs locally.

5 tools

Unix Timestamp Converter2 tools Unit Converter1 tools Date Difference Calculator1 tools Percentage Calculator1 tools

Collections

API Data Review KitFormat, validate, and compare JSON API responses with a guided step-by-step workflow.Web Encoding ToolkitEncode Base64, percent-encode URLs, and format HTML source for transport and implementation.Password & Hash ToolkitGenerate secure passwords and calculate MD5 or SHA hashes for development and testing workflows.Image & Color ToolkitConvert sRGB colors, compress images, and arrange selected images in a downloadable PDF.

Workflows

API Payload Review

Turn a captured JSON response into a readable document, then compare it with a known reference payload.

JSON Formatter Text Diff Checker

Local Web Asset Preparation

Compress browser-ready images, assemble approved visuals into a PDF, and translate colors into implementation values.

Image Compressor and Dimension Resizer Image to PDF and Image Extension Converter HEX, RGB and HSL Color Converter