Free browser-based utilities that streamline coding tasks with instant text processing, data conversion, and validation capabilities.
Fuel Economy Calculator Convert between fuel economy formats (MPG US, MPG UK, L/100km, km/L), calculate trip fuel costs, compare two vehicles side by side, estimate annual fuel expenses, and see CO2 emissions — all in one tool. Enter your values and results update instantly. How to Use Start with the fuel economy converter — enter ...
Try the Tool »Date Difference & Business Days Calculator Calculate the exact duration between two dates in days, weeks, months, and years. Count business days excluding weekends and regional public holidays. Add or subtract time from any date. Find the Nth business day from a starting date. All calculations update instantly. How to Use Pick a start and ...
Try the Tool »PGP Key Pair Generator Generate PGP public/private key pairs directly in your browser for email encryption, file signing, and identity verification. Choose between RSA and ECC key types, set an optional passphrase, and configure expiration. Both the public and private keys are output in standard ASCII-armored PEM format ready to import into any PGP-compatible application. ...
Try the Tool »HTTP Cache TTL / max-age Calculator Build HTTP Cache-Control headers visually. Select a caching strategy preset or configure individual directives — max-age, s-maxage, stale-while-revalidate, immutable, and more. Get a ready-to-use header string with human-readable explanations and CDN-specific equivalents. How to Use Choose a strategy preset (Static Assets, HTML Pages, API Responses, CDN Edge Cache) to ...
Try the Tool »Ohm’s Law Calculator Calculate voltage, current, resistance, and power instantly. Enter any two of the four electrical values — the calculator solves for the remaining two using Ohm’s Law (V=IR) and the power equation (P=VI). Supports unit prefixes from micro to mega for real-world engineering use. How to Use Enter any two values — Voltage ...
Try the Tool »Aztec Code Generator Generate Aztec Code 2D barcodes from any text, URL, or structured data. Aztec codes are used in boarding passes, transit tickets, and ID documents due to their compact size and high damage tolerance. Configure error correction level and module size, then download the barcode as a PNG. How to Use Enter your ...
Try the Tool »JSON to XML Converter Convert JSON data to well-formed XML instantly. Paste any JSON object or array and get structured XML output with configurable root element names, array handling, indentation, and XML declaration. Handles nested objects, arrays, all JSON types, and special character escaping. How to Use Paste your JSON data into the input area. ...
Try the Tool »HTML to Markdown Converter Convert HTML to clean Markdown instantly. Paste any HTML content — with headings, links, images, lists, tables, code blocks, and formatting — and get well-structured Markdown output ready for documentation, README files, or any Markdown-based platform. How to Use Paste your HTML into the input area. The Markdown output updates instantly. ...
Try the Tool »AES Encryption Key Generator Generate cryptographically secure AES encryption keys in 128, 192, or 256-bit sizes, in either hexadecimal or Base64 format. Produce up to 10 keys at once for AES-CBC, AES-GCM, AES-CTR, or any AES mode. All keys are generated using the browser’s crypto.getRandomValues() API for true randomness. How to Use Select your AES ...
Try the Tool »TSV to JSON Converter Convert tab-separated values (TSV) data to JSON instantly. Paste spreadsheet data or TSV files and get clean, structured JSON output — as an array of objects with headers as keys, or as a simple array of arrays. Handles quoted fields, type inference, and configurable formatting. How to Use Paste your TSV ...
Try the Tool »INI to JSON Converter Convert INI configuration files to structured JSON instantly. Paste INI data with sections, key-value pairs, and comments — get clean JSON output with sections as nested objects. Supports type coercion, comment stripping, duplicate key handling, and dot-notation subsections. How to Use Paste your INI configuration data into the input area. Sections ...
Try the Tool »ChaCha20 Key Generator Generate cryptographically secure ChaCha20 keys for use in stream cipher encryption. Produce 256-bit keys in hex or Base64 format, with optional initial counter values, in bulk batches of up to 10 keys at once. All generation uses the browser’s built-in crypto.getRandomValues() API for true randomness. How to Use Select your preferred output ...
Try the Tool »Number to Words Converter Convert any number into its written word form instantly. Enter a number — from simple integers to decimals and negatives — and get clean, grammatically correct text in English, French, Spanish, or German. Supports cardinal, ordinal, and currency formats. How to Use Type or paste a number into the input field. ...
Try the Tool »Punycode Encoder / Decoder Convert internationalized domain names (IDN) between Unicode and Punycode instantly. Enter a domain with non-ASCII characters like münchen.de and get the ASCII-compatible encoding xn--mnchen-3ya.de, or decode Punycode back to its readable Unicode form. Uses the RFC 3492 Bootstring algorithm for guaranteed-accurate results. How to Use Enter a domain name in the ...
Try the Tool »API Signature Generator Generate HMAC-based API request signatures for webhook verification, API authentication, and request signing. Supports HMAC-SHA1, HMAC-SHA256, and HMAC-SHA512 with secret keys in plain text or hexadecimal format, outputting both hex and Base64 signatures for immediate use in HTTP headers or query parameters. How to Use Enter the message or data to sign ...
Try the Tool »PHP Code Formatter & Beautifier Format and beautify your PHP code instantly using industry-standard style presets. Paste messy or inconsistently formatted PHP and get clean output that matches PSR-12, Laravel, or WordPress Coding Standards — with full control over indentation, brace placement, and line length. How to Use Paste your PHP code into the input ...
Try the Tool »SCSS / Sass Formatter & Beautifier Format and beautify your SCSS code instantly. Paste messy or compressed stylesheets and get clean, properly indented output with correct nesting, consistent spacing, and organized at-rules. Supports expanded, compact, and minified output modes. How to Use Paste your SCSS code into the input area. Choose your preferred indent size, ...
Try the Tool »TOTP / HOTP Secret Generator Generate cryptographically secure TOTP and HOTP secrets for two-factor authentication apps like Google Authenticator and Authy. The generator creates Base32-encoded secrets, produces a scannable QR code via the otpauth:// URI standard, and shows a live TOTP preview so you can verify the secret works before deploying it. How to Use ...
Try the Tool »C / C++ Code Formatter Format your C and C++ code instantly using industry-standard style presets. Paste messy or inconsistently formatted code and get clean, properly structured output that matches LLVM, Google, Chromium, Mozilla, WebKit, or Microsoft style guidelines — with full control over indentation, brace wrapping, and pointer alignment. How to Use Paste your ...
Try the Tool »Java Code Formatter & Beautifier Format and beautify your Java code instantly with industry-standard style presets. Paste messy or inconsistently formatted Java code and get clean, properly structured output that matches Google Java Style or Oracle Code Conventions — with full control over indentation, brace placement, and import sorting. How to Use Paste your Java ...
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Update: Our latest tool was added on Apr 15, 2026
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