All SpecWhale tools

Convert kilopascals to PSI instantly (1 kPa = 0.145038 psi), free and accurate.

Convert newton meters to foot-pounds instantly (1 N·m = 0.737562 ft·lb), free and accurate.

Convert foot-pounds to newton meters instantly (1 ft·lb = 1.35582 N·m), free and accurate.

Convert watts to mechanical horsepower instantly (1 W = 0.00134102 hp), free and accurate.

Convert miles per hour to kilometers per hour.

Convert kilometers per hour to miles per hour.

Convert fuel economy from liters per 100 km to miles per gallon.

Convert fuel economy from miles per gallon to liters per 100 km.

Convert degrees to radians instantly (1 deg = 0.0174533 rad), free and accurate.

Convert radians to degrees instantly (1 rad = 57.2958 deg), free and accurate.

Convert hours to minutes instantly (1 h = 60 min), free and accurate.

Convert minutes to hours instantly (1 min = 0.0166667 h), free and accurate.

Format JSON, validate syntax, and make raw JSON easier to read.

Minify JSON by removing whitespace while preserving valid data.

Convert an array of JSON objects into CSV.

Convert CSV rows into JSON objects using the header row as keys, right in your browser.

Encode or decode Base64 text locally -- no data leaves your browser or gets uploaded.

Encode or decode URL components (percent-encoding) for query strings and paths.

Escape or unescape HTML entities for safe snippets.

Turn titles into clean, lowercase, hyphenated URL slugs safe for links and filenames.

Convert CSV-style text into a Markdown table.

Compare two blocks of text line by line.

Test a regular expression against sample text.

Generate a simple robots.txt file with a sitemap line.

Generate a small sitemap.xml from a list of URLs.

Preview a search title and meta description length.

Build tagged campaign URLs from UTM parameters.

Convert text between uppercase, lowercase, title case, sentence case, camelCase, and snake_case.

Count words, characters, sentences, and estimated reading time.

Sort lines alphabetically and remove blank lines if needed.

Clean repeated spaces, tabs, and line breaks.

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes with Web Crypto.

Generate RFC 4122 version 4 UUID values locally, five at a time, no server round-trip.

Convert between Unix timestamps and human-readable dates.

Explain simple five-field cron expressions.

Validate a card or ID number locally using the Luhn checksum algorithm.

Check an IBAN's structure and mod-97 checksum locally.

Encode or decode Base32 (RFC 4648) text locally.

Encode or decode Base58 text locally, the alphabet used by Bitcoin addresses.

Strip blank lines and leading indentation from JavaScript locally -- a safe, whitespace-only minify that can't break your code.

Check a VIN's check digit, region, and model year locally using the standard formula.

Search common HTTP status codes and meanings.

Search common MIME types by extension or content type.

Resize an image locally in your browser and download the result.

Compress JPEG, PNG, or WebP images locally with adjustable quality.

Convert an image to WebP locally in the browser.

Convert a local image to PNG in your browser without uploading it.

Convert a local image to JPEG in your browser with adjustable quality.

Pick a color from an uploaded image using a local canvas.

Generate 16, 32, 48, 180, 192, and 512px favicon PNGs from one image, locally in your browser.

Turn a local image into a grayscale version in your browser.

Invert a local image's colors with browser canvas processing.

Apply a sepia filter to a local image without uploading it.

Apply a light blur effect to a local image in your browser.

Flip a local image horizontally using browser canvas.

Rotate a local image 90 degrees clockwise without uploading it.

Crop the center of a local image into a square preview and download.

Create a pixelated version of a local image in your browser.

Inspect basic image file metadata available to the browser.

Generate a QR code as an SVG for URLs, text, Wi-Fi notes, and labels.