Formatters, validators, encoders and generators that developers reach for every day. They run instantly in the browser with no sign-up, so you can check a JSON payload or generate a UUID without leaving your workflow. The first live tools are the daily essentials: the JSON Formatter beautifies and validates JSON with your choice of indent, and the UUID v4 Generator creates random version-4 identifiers in bulk for database keys and test data. Base64 encoding and decoding live in the Encoders category and work the same way — UTF-8 safe, entirely local, which matters when the text you are encoding is a token or a secret. Later batches add hash generators, regex testers, JWT decoders, SQL formatters, color pickers, cron expression explainers and dozens more utilities. Because everything runs client-side, your code, keys and test data never leave your machine, and the tools work offline once loaded. The tools are deliberately small and fast: no frameworks to load, no tracking, and results in milliseconds, so they fit into a workflow without breaking concentration.

2 tools live now. Use one below — the rest of this category arrives in later batches.

Live tools

• JSON Formatter

  Beautify and indent JSON code with configurable style.

  Open tool →

• UUID v4 Generator

  Generate random UUIDs in bulk.

  Open tool →

Tools planned for this category

• .gitignore Generator

  Combine gitignore templates.

• .htaccess Generator

  Redirects, HTTPS, caching rules.

• API Key Generator

  Random secure API keys.

• ASCII Table

  Full ASCII chart with codes.

• Barcode Check Digit Calculator

  Compute EAN/UPC check digits.

• Basic Auth Header Generator

  Create Authorization headers.

• Big Number Calculator

  Arbitrary-precision arithmetic.

• Binary to Decimal Converter

  Convert binary values to decimal.

• Binary to Hexadecimal Converter

  Convert binary values to hexadecimal.

• Binary to Octal Converter

  Convert binary values to octal.

• Binary to Text (ASCII) Converter

  Convert binary values to text (ascii).

• Bitwise Calculator

  AND, OR, XOR, shifts on numbers.

• Chmod Calculator

  Convert Unix permissions numeric/symbolic.

• Cloudflare _headers Generator

  Security/cache headers for Pages.

• Cloudflare _redirects Generator

  Build _redirects for Cloudflare Pages.

• Code Diff Checker

  Side-by-side code diff.

• Code to Image (Carbon-style)

  Beautiful code screenshots.

• Color Code Converter for Android/iOS

  HEX to UIColor/Color Int.

• Conventional Commit Message Builder

  Write proper commit messages.

• Cookie Parser

  Decode cookie strings.

• Country Code List

  ISO country codes, dial codes, currencies.

• Credit Card Test Number Generator (Luhn)

  Gateway sandbox test numbers that pass Luhn.

• Cron Expression Explainer

  Explain cron in plain English with next runs.

• Cron Expression Generator

  Build cron schedules visually.

• Crontab Guru Alternative

  Human-friendly cron editor.

• CSS Autoprefixer

  Add vendor prefixes.

• CSS Formatter

  Beautify and indent CSS code with configurable style.

• CSS Minifier

  Minify CSS to reduce file size.

• CSS to SCSS (Nesting)

  Convert flat CSS into nested SCSS.

• CSS to Tailwind Converter

  Map CSS rules to Tailwind classes.

• CSS Validator

  Check CSS for syntax errors and show the exact line.

• CSV to SQLite Query Tool

  Query CSV files with SQL.

• CSV Validator

  Check CSV for syntax errors and show the exact line.

• Date Format Tester (strftime/moment)

  Preview date format patterns.

• Decimal to Binary Converter

  Convert decimal values to binary.

• Decimal to Hexadecimal Converter

  Convert decimal values to hexadecimal.

• Decimal to Octal Converter

  Convert decimal values to octal.

• Decimal to Text (ASCII) Converter

  Convert decimal values to text (ascii).

• docker-compose Generator

  Build compose files visually.

• Dockerfile Generator

  Generate Dockerfiles for common stacks.

• Email Address Validator (Syntax)

  Check email syntax rules.

• Epoch Batch Converter

  Convert many timestamps at once.

• ER Diagram from SQL

  Visualize tables from SQL DDL.

• Fake JSON Data Generator

  Generate mock data from a template.

• Flowchart Maker

  Draw flowcharts and export PNG/SVG.

• GitHub Actions Workflow Generator

  Build CI YAML files.

• GraphQL Formatter

  Beautify and indent GraphQL code with configurable style.

• GraphQL Minifier

  Minify GraphQL to reduce file size.

• GraphQL Query Builder

  Build queries from a schema.

• Graphviz DOT Viewer

  Render DOT graphs.

• Hexadecimal to Binary Converter

  Convert hexadecimal values to binary.

• Hexadecimal to Decimal Converter

  Convert hexadecimal values to decimal.

• Hexadecimal to Octal Converter

  Convert hexadecimal values to octal.

• Hexadecimal to Text (ASCII) Converter

  Convert hexadecimal values to text (ascii).

• HTML Entity Encoder/Decoder

  Escape & < > characters.

• HTML Formatter

  Beautify and indent HTML code with configurable style.

• HTML Live Editor (CodePen-like)

  Edit HTML/CSS/JS with live preview.

• HTML Minifier

  Minify HTML to reduce file size.

• HTML to JSX

  Convert HTML to React JSX.

• HTML Validator

  Check HTML for syntax errors and show the exact line.

• HTTP Header Parser

  Parse raw headers into a table.

• HTTP Status Code Reference

  Search all HTTP codes with meaning.

• IBAN Validator

  Check IBAN format and checksum.

• IEEE 754 Float Converter

  See float binary representation.

• ISBN Validator & Converter

  Validate ISBN-10/13 and convert.

• ISO 8601 Date Formatter

  Format dates in ISO/RFC formats.

• JavaScript Deobfuscator / Unminifier

  Make minified JS readable.

• JavaScript Formatter

  Beautify and indent JavaScript code with configurable style.

• JavaScript Minifier

  Minify JavaScript to reduce file size.

• JavaScript Obfuscator

  Obfuscate JS code.

• JavaScript Playground

  Run JS snippets with console output.

• JavaScript Validator

  Check JavaScript for syntax errors and show the exact line.

• JQ Playground

  Run jq filters on JSON.

• JSON Diff

  Compare two JSON documents structurally.

• JSON Editor

  Edit JSON in tree/code mode.

• JSON Escape / Unescape

  Escape strings for JSON.

• JSON Flattener

  Flatten nested JSON into dot keys.

• JSON Minifier

  Minify JSON to reduce file size.

• JSON Path Tester

  Query JSON with JSONPath.

• JSON Schema Generator

  Infer a schema from JSON.

• JSON Schema Validator

  Check JSON Schema for syntax errors and show the exact line.

• JSON Sorter

  Sort JSON keys alphabetically.

• JSON Unflattener

  Rebuild nested JSON from dot keys.

• JSON Validator

  Check JSON for syntax errors and show the exact line.

• JSON Viewer (Tree)

  Explore JSON as a collapsible tree.

• JSX to JavaScript (Babel)

  Transpile JSX/modern JS.

• JWT Decoder

  Decode JWT header and payload.

• JWT Generator (HS256)

  Sign test JWTs with a secret.

• JWT Verifier

  Verify JWT signatures with a key.

• Keycode Finder

  Press a key to see key/code/which.

• LaTeX to Image

  Render LaTeX as PNG/SVG.

• LESS to CSS

  Compile LESS to CSS.

• LICENSE Generator

  Pick and fill open-source licenses.

• Luhn Checksum Validator

  Validate Luhn check digits.

• Markdown Formatter

  Beautify and indent Markdown code with configurable style.

• Markdown Table Generator

  Build Markdown tables visually.

• Math LaTeX Editor

  Write LaTeX equations and export images.

• Mermaid Diagram Editor

  Write diagrams as code with preview.

• MIME Type Lookup

  Find MIME type by extension.

• Mock API Response Builder

  Design sample REST responses.

• NanoID Generator

  Short URL-safe IDs.

• Nginx Config Generator

  Generate server blocks.

• OAuth PKCE Generator

  Create code_verifier and challenge.

• Octal to Binary Converter

  Convert octal values to binary.

• Octal to Decimal Converter

  Convert octal values to decimal.

• Octal to Hexadecimal Converter

  Convert octal values to hexadecimal.

• Octal to Text (ASCII) Converter

  Convert octal values to text (ascii).

• OpenAPI / Swagger Viewer

  View API docs from a spec file.

• package.json Generator

  Create package.json from a form.

• Phone Number Formatter

  Format numbers in E.164 by country.

• PHP Formatter

  Beautify and indent PHP code with configurable style.

• PHP Online Runner

  Run PHP code in the browser.

• Python Formatter

  Beautify and indent Python code with configurable style.

• Python Online Compiler

  Run Python in the browser.

• Query String Builder

  Build and edit URL parameters.

• README Generator

  Create a GitHub README from a form.

• Regex Explainer

  Explain a regex in plain English.

• Regex Generator from Examples

  Build a regex from sample strings.

• Regex Tester

  Test regular expressions with match highlighting.

• Regex Validator

  Check Regex for syntax errors and show the exact line.

• RSS Feed Generator

  Create RSS XML from a list of items.

• SCSS Formatter

  Beautify and indent SCSS code with configurable style.

• SCSS to CSS

  Compile SCSS/Sass to CSS.

• Semver Calculator

  Check version ranges and bumps.

• Sitemap XML Generator (from URL list)

  Paste URLs and get sitemap.xml.

• SQL Escape Tool

  Escape SQL strings.

• SQL Formatter

  Beautify and indent SQL code with configurable style.

• SQL Minifier

  Minify SQL to reduce file size.

• SQL Playground (SQLite)

  Run SQL queries on an in-browser database.

• String Escape Tool (JS/Java/C#)

  Escape strings for code.

• SVG Minifier

  Minify SVG to reduce file size.

• SVG to JSX / React Component

  Turn SVG into a React component.

• Syntax Highlighter (HTML export)

  Highlight code and copy HTML.

• Text (ASCII) to Binary Converter

  Convert text (ascii) values to binary.

• Text (ASCII) to Decimal Converter

  Convert text (ascii) values to decimal.

• Text (ASCII) to Hexadecimal Converter

  Convert text (ascii) values to hexadecimal.

• Text (ASCII) to Octal Converter

  Convert text (ascii) values to octal.

• Timezone List & Offsets

  IANA time zones with current offsets.

• TOML Validator

  Check TOML for syntax errors and show the exact line.

• TypeScript Formatter

  Beautify and indent TypeScript code with configurable style.

• TypeScript to JavaScript

  Transpile TS to JS.

• ULID Generator

  Sortable unique IDs.

• Unix Timestamp Converter

  Convert epoch to date and back.

• URL Parser

  Break URL into protocol, host, path, params.

• User Agent Parser

  Parse browser/OS/device from UA string.

• UUID v1 Generator

  Timestamp-based UUID v1.

• UUID v7 Generator

  Time-ordered UUID v7.

• UUID Validator & Decoder

  Check version and decode timestamp.

• Webhook Payload Formatter

  Pretty-print and inspect webhook JSON.

• Wrangler.toml Generator

  Generate Cloudflare Workers config.

• XML Formatter

  Beautify and indent XML code with configurable style.

• XML Minifier

  Minify XML to reduce file size.

• XML Validator

  Check XML for syntax errors and show the exact line.

• YAML Formatter

  Beautify and indent YAML code with configurable style.

• YAML Validator

  Check YAML for syntax errors and show the exact line.

About this category

When will these tools be ready to use?

Tools are published in batches, starting with the 40 highest-value tools in Phase 1. Each tool goes live only when it is fully working, tested on mobile, and has its own written guide.

Will my files be uploaded when I use a tool?

No. Every Toolsvine tool runs 100% in your browser. Files, text and images you use in a tool never leave your device.