Free browser tools for everyday text, number and file problems — no sign-up, no install, and nothing you enter ever leaves your device.
TEXT & WRITING
Live word, character, sentence and reading-time stats as you type.
02Switch text between UPPER, lower, Title and Sentence case instantly.
03Validate and pretty-print JSON, or minify it for production.
04Convert plain text to Base64 and back, entirely in your browser.
CALCULATORS
Body mass index from your height and weight, with the WHO category.
06Exact age in years, months and days from any date of birth.
07Percent of a number, percent change, and what-percent-is-x-of-y.
08Monthly instalment, total interest and payoff schedule for any loan.
09Work out your annual Zakat from cash, gold, silver and savings.
10Length, weight and temperature conversions in one place.
GENERATORS & UTILITIES
Strong random passwords with full control over length and character set.
12Turn any link or text into a downloadable QR code.
13Pick a color or convert between HEX, RGB and HSL.
FILE & IMAGE TOOLS
Shrink a photo's file size by adjusting quality, with a before/after comparison.
15Resize any image to exact pixel dimensions, with an aspect-ratio lock.
16Convert between PNG, JPG and WebP formats.
17Combine several photos into a single downloadable PDF.
18Combine multiple PDF files into one, in the order you choose.
19Convert a .docx document to PDF, keeping headings, lists and basic formatting.
20Bundle several files into one compressed .zip archive.
21Shrink a video's file size by choosing quality and resolution.
22Reduce a PDF's file size — great for scanned or image-heavy documents.
23Drop in any file type — it detects what it is and compresses it the right way.
Every tool on this site runs as plain JavaScript in your own browser. There's no upload step and no server processing your input, which means your text, numbers and files stay on your device the whole time. That also makes the tools fast — results update as you type, with no waiting on a network request.
New tools get added as they're built. If there's a small calculator or converter you keep needing and can't find here, the contact page is the place to ask for it.