One place for every category. Tools marked Soon are in the catalog and will unlock as they ship.
11 tools · Edit and convert PDFs instantly
Combine multiple PDF files into one document in your browser. Reorder files, merge instantly, and download — private, no upload, and no account required.
Split a PDF into pages or ranges in your browser. Extract selected pages or download separate files as a ZIP. Private — nothing is uploaded to a server.
Compress a PDF in your browser. Pages are rasterized to JPEG at low, medium, or high quality so the file shrinks for email. Files never leave this tab.
Convert PDF pages to JPG or PNG in your browser. Choose DPI, pick specific pages, and download a ZIP of images. Files never leave this device at all.
Turn JPG, PNG, and WebP images into a PDF in your browser. Reorder photos, pick A4 or Letter, set margins, and download instantly. No upload and no signup.
Add text, images, and signatures on top of any PDF in your browser. Drag, resize, undo, then download. Original pages stay intact — nothing is uploaded.
16 tools · Format, encode, and test code
Format, beautify, minify, and validate JSON in your browser. Syntax highlighting, error detection, and key sorting — free, instant, no signup or upload.
Developer
Validate JSON in real time with line and column errors. Auto-repair trailing commas, unquoted keys, and single quotes — free, private, no signup or upload.
Developer
Test regular expressions against sample text
Developer
Encode and decode Base64 in your browser with Unicode, URL-safe alphabet, and live conversion. No upload, no signup — free online Base64 encoder and decoder.
Developer
URL-encode and decode query strings and full URLs with encodeURI or encodeURIComponent. Component vs full URI, live conversion — free, private, no upload.
Developer
Encode and decode HTML entities with named or numeric modes, special characters or all characters, and a live preview. Free developer tool, no upload.
Developer
13 tools · Count, convert, and clean text
Count words, characters, sentences, and paragraphs in real time. See reading time, speaking time, and keyword density — free online, no signup required.
Text
Count characters, letters, digits, spaces, and lines as you type. Check Twitter, SMS, Google title, and meta description caps — free, private, no signup.
Text
Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more. Instant, free, and private — everything runs in your browser.
Text
Remove duplicate lines from emails, SKUs, or any list. Case-sensitive matching, trim whitespace, and preserve original order — free, private, in-browser.
Text
Find and replace text in bulk with regex, whole-word match, case options, and live highlighting. Preview matches before you replace — free, private, no upload.
Text
Compare two texts and highlight differences
Text
29 tools · Tires, wheels, and fitment specs
Look up OE bolt pattern, tire size, offset, and center bore by year, make, and model — then check if an aftermarket wheel and tire setup fits. No VIN.
Auto
Enter a metric or flotation tire size to get overall diameter, section width, sidewall, circumference, and revolutions per mile. Free, instant, no signup.
Auto
Compare two tire sizes side by side: diameter, width, sidewall, ride height, and rev/mile, plus Preferred ±2% or Acceptable ±3% fitment bands — free online.
Auto
Convert metric sizes like 275/60R20 to flotation such as 35x12.50R20 and back. See the exact equivalent and nearest catalog match — free, private, in-browser.
Auto
See how a taller or shorter tire changes indicated speed. Get actual speed, percent error, and a 25–75 mph table from stock vs new size — free, private.
Auto
Convert indicated odometer miles into real distance after a tire diameter change. See actual miles, percent error, and the diameter ratio — free, private.
Auto