# ToolMono

> ToolMono is a free, open-source collection of 70+ browser-based developer tools. All tools run entirely client-side — no data is ever sent to a server. No signup, no rate limits, no tracking. Built with Next.js.

ToolMono provides instant, privacy-first utilities for developers, writers, data engineers, and students. Every tool processes data locally in the browser using client-side JavaScript. The platform covers text manipulation, code formatting, data conversion, encoding, hashing, PDF operations, math calculators, and more.

Tools are organized into 17 categories. Each tool page includes an interactive UI, usage guide, worked examples, best practices with authority citations, common errors, FAQs, and keyboard shortcuts. All guide content is optimized for clarity and citability.

## Tools — Text

- [Case Converter](https://toolmono.com/tools/text-case-converter): Free online Case Converter. Switch text to lowercase, UPPERCASE, Title Case, camelCase, snake_case, PascalCase & more instantly. Free, no signup needed.
- [Word Counter](https://toolmono.com/tools/word-counter): Free online Word Counter. Count words, characters, sentences, paragraphs, and estimate reading time instantly. 100% secure, private, and no signup needed.

## Tools — Code

- [JSON Formatter](https://toolmono.com/tools/json-formatter): Free online JSON Formatter. Prettify, beautify, parse, validate, and minify JSON files instantly. 100% secure client-side processor, no logs, no signup.
- [SQL Formatter](https://toolmono.com/tools/sql-formatter): Free online SQL Formatter. Prettify, beautify, and format SQL queries, statement syntax, and database scripts instantly. 100% secure client-side processor.
- [SQL Minifier](https://toolmono.com/tools/sql-minifier): Free online SQL Minifier tool. Minify SQL queries by removing whitespace and comments.
- [Regex Tester](https://toolmono.com/tools/regex-tester): Free online Regex Tester tool. Build and test regular expressions with real-time match highlighting.
- [XML Validator](https://toolmono.com/tools/xml-validator): Free online XML Validator tool. Validate XML documents and find syntax errors.
- [YAML Validator](https://toolmono.com/tools/yaml-validator): Free online YAML Validator tool. Validate YAML documents and find syntax errors.
- [CSV Validator](https://toolmono.com/tools/csv-validator): Free online CSV Validator tool. Validate CSV documents and find syntax errors.
- [SQL Validator](https://toolmono.com/tools/sql-validator): Free online SQL Validator tool. Validate SQL queries and find syntax errors.
- [SQL Query Analyzer](https://toolmono.com/tools/sql-query-analyzer): Free online SQL Query Analyzer tool. Analyze SQL queries to extract tables, columns, and operations.

## Tools — Data

- [JSON → CSV](https://toolmono.com/tools/json-to-csv): Free online JSON → CSV tool. Convert JSON arrays to CSV format and download the result.
- [CSV → JSON](https://toolmono.com/tools/csv-to-json): Free online CSV → JSON tool. Parse CSV files and convert them to structured JSON.
- [Excel → JSON](https://toolmono.com/tools/excel-to-json): Free online Excel → JSON tool. Parse Excel files and convert them to structured JSON.
- [JSON → Excel](https://toolmono.com/tools/json-to-excel): Free online JSON → Excel tool. Convert JSON arrays to Excel format and download the result.
- [YAML ↔ JSON](https://toolmono.com/tools/yaml-to-json): Free online YAML ↔ JSON tool. Convert YAML configuration files to JSON and back.
- [XML ↔ JSON](https://toolmono.com/tools/xml-to-json): Free online XML ↔ JSON tool. Convert XML data to JSON and back.

## Tools — Crypto

- [Hash Generator](https://toolmono.com/tools/hash-generator): Free online Hash Generator tool. Generate MD5, SHA-1, SHA-256, SHA-512, and bcrypt hashes.
- [JWT Decoder](https://toolmono.com/tools/jwt-decoder): Free online JWT Decoder tool. Decode and inspect JWT tokens. View header, payload, and verify structure.
- [JWT Generator](https://toolmono.com/tools/jwt-generator): Free online JWT Generator tool. Generate JWT tokens with custom payloads and secrets.

## Tools — Network

- [URL Parser](https://toolmono.com/tools/url-parser): Free online URL Parser tool. Parse and inspect all parts of a URL: protocol, host, path, query.

## Tools — Time

- [Unix Timestamp Converter](https://toolmono.com/tools/timestamp-converter): Free online Unix Timestamp tool. Convert Unix timestamps to human-readable dates and vice versa.

## Tools — Math

- [Calculator](https://toolmono.com/tools/calculator): Free online Calculator tool.
- [Percentage Calculator](https://toolmono.com/tools/percentage-calculator): Free online Percentage Calculator tool.
- [Scientific Calculator](https://toolmono.com/tools/scientific-calculator): Free online Scientific Calculator tool.
- [Binary ↔ Decimal Converter](https://toolmono.com/tools/binary-decimal-converter): Free online Binary ↔ Decimal Converter tool.
- [Decimal ↔ Hex Converter](https://toolmono.com/tools/decimal-hex-converter): Free online Decimal ↔ Hex Converter tool.
- [Decimal ↔ Octal Converter](https://toolmono.com/tools/decimal-octal-converter): Free online Decimal ↔ Octal Converter tool.
- [Prime Number Checker](https://toolmono.com/tools/prime-checker): Free online Prime Number Checker tool.
- [GCD & LCM Calculator](https://toolmono.com/tools/gcd-lcm-calculator): Free online GCD & LCM Calculator tool.
- [Fibonacci Generator](https://toolmono.com/tools/fibonacci-generator): Free online Fibonacci Generator tool.
- [Random Number Generator](https://toolmono.com/tools/random-generator): Free online Random Number Generator tool.
- [Age Calculator](https://toolmono.com/tools/age-calculator): Free online Age Calculator tool.
- [Date Difference Calculator](https://toolmono.com/tools/date-diff-calculator): Free online Date Difference Calculator tool.

## Tools — Color

- [Color Converter](https://toolmono.com/tools/color-converter): Free online Color Converter tool. Convert between HEX, RGB, HSL, OKLCH, and CSS named colors.

## Tools — Encoding

- [Base64 Encode / Decode](https://toolmono.com/tools/base64): Free online Base64 Encode / Decode tool. Encode strings to Base64 or decode Base64 back to plain text.
- [URL Encoder / Decoder](https://toolmono.com/tools/url-encoder): Free online URL Encoder / Decoder tool. Percent-encode and decode URLs and query string parameters.

## Tools — Generate

- [UUID Generator](https://toolmono.com/tools/uuid-generator): Free online UUID Generator tool. Generate v1, v4, and v7 UUIDs in bulk with format options.
- [Password Generator](https://toolmono.com/tools/password-generator): Free online Password Generator tool. Generate cryptographically secure passwords with custom rules.
- [Lorem Ipsum](https://toolmono.com/tools/lorem-ipsum-generator): Free online Lorem Ipsum tool. Generate placeholder text with customizable paragraphs and words.
- [Mock Data Generator](https://toolmono.com/tools/mock-data-generator): Free online Mock Data Generator tool. Generate realistic mock data using Faker API for testing.
- [JSON Schema Generator](https://toolmono.com/tools/json-schema-generator): Free online JSON Schema Generator tool. Generate JSON schema from JSON payload.
- [QR Code Generator](https://toolmono.com/tools/qr-code-generator): Free online QR Code Generator tool. Generate and download QR codes.
- [QR Code Reader](https://toolmono.com/tools/qr-code-reader): Free online QR Code Reader tool. Read data from QR code images.

## Tools — Diff

- [Text Diff](https://toolmono.com/tools/text-diff): Free online Text Diff tool. Compare two text blocks side-by-side and highlight the differences.
- [JSON Diff](https://toolmono.com/tools/json-diff-checker): Free online JSON Diff tool. Compare two JSON objects side-by-side and highlight the differences.
- [Project Diff](https://toolmono.com/tools/project-diff-viewer): Free online Project Diff tool. Compare two project directories or multiple files side-by-side without uploading to a server.

## Tools — Project Tools

- [Package.json Explorer](https://toolmono.com/tools/package-json-explorer): Free online Package.json Explorer. Upload, paste, and validate your package.json dependencies and scripts.
- [Requirements.txt Analyzer](https://toolmono.com/tools/requirements-txt-analyzer): Free online Requirements.txt Analyzer. Parse Python dependencies, detect project stacks, find duplicate packages, and export JSON/HTML reports instantly.
- [Import Sort Preview](https://toolmono.com/tools/import-sort-preview): Free online Import Sort Preview tool. See how your source code imports will be organized and sorted for languages like JavaScript, TypeScript, Python, Go, and Java.
- [Dependency Tree Viewer](https://toolmono.com/tools/dependency-tree-viewer): Free online Dependency Tree Viewer tool. Visualize, analyze, and export your dependency graph from package.json, package-lock.json, or requirements.txt.
- [Dependency License Analyzer](https://toolmono.com/tools/dependency-license-analyzer): Analyze dependency licenses from package.json and requirements.txt. Detect MIT, Apache, GPL, BSD, ISC, and other common licenses. Export reports securely in your browser.

## Tools — PDF

- [PDF to Markdown](https://toolmono.com/tools/pdf-to-markdown): Free, local PDF to Markdown converter. Extract text, metadata, and document statistics. Export as Markdown, HTML, Plain Text, or JSON entirely within your browser.
- [PDF to JSON](https://toolmono.com/tools/pdf-to-json): Free online PDF to JSON converter. Upload a PDF and extract its text, structure, tables, and metadata into a deeply nested JSON format instantly in your browser.
- [PDF to Text](https://toolmono.com/tools/pdf-to-text): Free online PDF to Text converter. Upload a PDF and extract its plain text instantly in your browser while preserving formatting, paragraphs, and reading order.
- [PDF Metadata Viewer](https://toolmono.com/tools/pdf-metadata-viewer): Free offline PDF Metadata Viewer. Instantly extract and inspect hidden properties, author info, creation dates, encryption states, and raw XMP payloads securely in your browser.
- [PDF Table Extractor](https://toolmono.com/tools/pdf-table-extractor): Free online PDF Table Extractor. Upload a PDF to automatically extract, edit, and export embedded tables into CSV, Excel, JSON, Markdown, or HTML.
- [PDF Search & Extract](https://toolmono.com/tools/pdf-search-extract): Free online PDF Search tool. Upload a PDF and instantly search for text, regex patterns, and extract matching paragraphs.
- [Merge PDF](https://toolmono.com/tools/merge-pdf): Free online PDF Merge tool. Upload multiple PDFs, select specific pages, reorder visually, and combine them effortlessly right in your browser.
- [Split PDF](https://toolmono.com/tools/split-pdf): Free online PDF Split tool. Upload a PDF, select pages, and split them effortlessly right in your browser.
- [Rotate PDF](https://toolmono.com/tools/rotate-pdf): Free online PDF Rotate tool. Upload a PDF and permanently rotate individual pages or the entire document securely in your browser.
- [Extract PDF Pages](https://toolmono.com/tools/extract-pdf-pages): Free online PDF Extraction tool. Upload a PDF and extract specific pages to create a new document securely in your browser.
- [Reorder PDF Pages](https://toolmono.com/tools/reorder-pdf-pages): Free online PDF Reorder tool. Upload a PDF and drag and drop pages to change their order securely in your browser.
- [Delete PDF Pages](https://toolmono.com/tools/delete-pdf-pages): Free online PDF Page Deletion tool. Upload a PDF and permanently delete specific pages securely in your browser.
- [Watermark PDF](https://toolmono.com/tools/watermark-pdf): Free online PDF Watermark tool. Upload a PDF and easily stamp custom text or image watermarks on all pages securely in your browser.
- [Add Page Numbers](https://toolmono.com/tools/add-page-numbers-pdf): Free online PDF Page Numbering tool. Upload a PDF and easily add page numbers to all pages securely in your browser.
- [Add Text to PDF](https://toolmono.com/tools/add-text-to-pdf): Free online PDF editor. Upload a PDF and easily type text, fill forms, or add notes anywhere on the page securely in your browser.
- [Add Images to PDF](https://toolmono.com/tools/add-images-to-pdf): Free online PDF editor. Upload a PDF and easily insert, resize, and position images anywhere on the page securely in your browser.
- [Password Protect PDF](https://toolmono.com/tools/password-protect-pdf): Free online PDF tool. Securely add a password to encrypt and protect your PDF documents directly in your browser.
- [Unlock PDF](https://toolmono.com/tools/unlock-pdf): Remove passwords from PDF files instantly in your browser. No uploads, no servers. You must know the current password — this tool does not crack or bypass encryption.

## Pages

- [Home](https://toolmono.com/): Browse all 70+ developer tools by category
- [About](https://toolmono.com/about): Learn about ToolMono's mission, architecture, and privacy commitment
- [API Documentation](https://toolmono.com/api-docs): REST API reference for programmatic tool access
- [Contact](https://toolmono.com/contact): Get in touch with the ToolMono team

## Optional

- [Privacy Policy](https://toolmono.com/privacy-policy): Data handling and privacy practices
- [Terms of Service](https://toolmono.com/terms-of-service): Usage terms and conditions
- [Changelog](https://toolmono.com/changelog): Release notes and feature updates
- [Full Documentation](https://toolmono.com/llms-full.txt): Expanded llms.txt with complete tool guides, FAQs, and examples