📄 PDF Tools
Combine multiple PDF files into one. Select 2 or more PDFs.
🖼️ Image Compressor
Shrink JPEG/PNG files right in your browser.
🔳 QR Code Generator
Turn any text or URL into a downloadable QR code.
🛠️ Developer Utilities
Unix Timestamp Converter
Now: —
Password / Token Generator
UUID v4 Generator
🧾 JSON Formatter / Validator — Free
Paste JSON and get it pretty-printed and validated instantly. All parsing happens locally — your data never leaves the browser.
🔤 Base64 Encode / Decode — Free
Convert text to and from Base64. Useful for debuggers, tokens, and data URLs. Fully client-side.
🔢 Word & Character Counter — Free
Paste any text to see word, character (with and without spaces), and line counts in real time.
📐 Unit Converter — Free
Convert between common length, weight, and temperature units. Great for cooking, travel, and school.
🎨 Color Converter (HEX ↔ RGB) — Free
Paste a HEX or RGB color to convert between formats. Handy for CSS and design work.
🔗 URL Encode / Decode — Free
Make URLs safe for query strings, or decode them back. Common in web dev and API work.
🔡 Text Case Converter — Free
Normalize text casing for titles, headings, or code comments. One click per format.
🧬 Regex Tester — Free
Enter a pattern and test it against your text. See matches highlighted. Great for debugging regex.
🔒 Hash Generator (SHA-256 / SHA-512) — Free
Hash any text with SHA-256 or SHA-512 using the Web Crypto API. No data leaves your device.
📊 CSV ⇄ JSON Converter — Free
Paste CSV (first row = headers) to get JSON, or paste a JSON array to get CSV. Fully client-side.
🔢 Number Base Converter — Free
Type a number; we detect its base and show it in binary, octal, decimal, and hex.
📝 Lorem Ipsum Generator — Free
Enter a paragraph count (default 3) to generate clean placeholder text for mockups.
🆚 Text Diff — Free
Paste original, a line of =====, then the changed text. Added/removed lines are shown.
🏷️ HTML Entity Encode / Decode — Free
Convert characters like < > & to safe HTML entities and back. Useful for HTML/CSS work. v2.1
🔗 Slug Generator — Free
Paste a heading to get a clean, lowercase, hyphenated URL slug.
💪 Password Strength Checker — Free
Type a password to see its strength score and what would make it stronger.
🎲 Dice Roller — Free
Enter notation like 3d6 or 2d10+2 and roll. Great for tabletop games.
📊 Percentage Calculator — Free
Enter two numbers A and B (space-separated): A is treated as a percent of B.
🕓 Epoch Converter — Free
Paste an epoch (seconds or ms) to get a readable UTC date.
🏛️ Roman Numeral Converter — Free
Type 1994 or MCMLXIV to convert both ways.
📻 Morse Code Translator — Free
Type text to get Morse, or Morse to get text.
⚖️ BMI Calculator — Free
Enter weight (kg) and height (m) space-separated.
🧾 Tip Calculator — Free
Enter bill, tip %, and party size space-separated.
🔣 Text ⇄ Binary Converter — Free
Type text to get binary, or binary to get text.
🎂 Age Calculator — Free
Enter a date (YYYY-MM-DD).
🔐 Random Password Generator — Free
Set length and character sets, get a cryptographically random password. Never leaves your device.
🎲 Random Number Generator — Free
Enter MIN MAX (space-separated) to get a securely random integer.
🔄 Text Reverser — Free
Paste text to see it reversed instantly.
🎨 HEX ⇄ RGB Converter — Free
Paste a HEX or RGB color to convert between formats. Handy for CSS.
🔗 URL Encode / Decode — Free
Make URLs safe for query strings or decode them back.
🔡 Text Case Converter — Free
Normalize text casing for titles and headings. One click per format.
🔢 Word & Character Counter — Free
Paste any text to see word, character, and line counts in real time.
🆚 Text Diff — Free
Paste original, a line of =====, then the changed text to see deltas.
🕓 Epoch Converter — Free
Paste an epoch (seconds or ms) to get a readable UTC date.
⚖️ BMI Calculator — Free
Enter weight (kg) and height (m) space-separated.
🔗 Slug Generator — Free
Paste a heading to get a clean, hyphenated URL slug.
🔤 Base64 Encode — Free
Convert text to Base64 for data URLs and tokens. Fully client-side.
🔣 Text ⇄ Binary Converter — Free
Type text to get binary, or binary to get text.
🏛️ Roman Numeral Converter — Free
Type 1994 or MCMLXIV to convert both ways.
📻 Morse Code Translator — Free
Type text to get Morse, or Morse to get text.
🧾 Tip Calculator — Free
Enter bill, tip %, and party size space-separated.
🤖 For Agents & Developers
CryptoToolBox isn't just a website — it's a callable toolkit for AI agents. Use it as an MCP server (Claude, Hermes, any MCP client) or as a native ElizaOS plugin.
- MCP server:
npx -y github:irun2themoney/crypto-toolbox-mcp— repo - ElizaOS plugin: 11 Web3/crypto actions (balances, tx decode, ENS, Chainlink price, payment verify) — repo
- Full agent toolkit docs →
☕ Like these free tools? Support the project.
CryptoToolBox is 100% free and costs nothing to use. If it saved you time, fund it — no account to tip crypto, or back it monthly via GitHub Sponsors.
0xc62b0aCba58E2Fc31cE2d27721Ee51154a808f52 D19x8rMGo9dCv98UGaNuv6SM2Xov8Q5TxCkjrmfeynmn bc1qynsd9rv40d89fpudg242f73x2cjesam75gu43f Self-custody wallet. Addresses only. Never share a private key with anyone.