Online Calculators

Nine modes covering change, discount, tax, tip splits and reverse percentages.

Exact age, lifetime totals, day milestones, next birthday and generation.

Loan EMI with prepayment modelling and a full amortisation schedule.

Convert across 14 categories from length and weight to pressure, energy and power.

Compare a moment across zones and find an hour that works for everyone.

Add or remove GST with the CGST/SGST split, stack discounts properly, and compare loan repayments.

Everything for getting a picture into the shape, size and format something else will accept — compression, resizing, cropping, conversion between formats and background removal.

Everything for the PDF itself — joining files and taking pages out, making one smaller, stamping, redacting and locking it, and converting it to and from Word, Excel and images.

Tools for text and the formats it gets trapped inside — counting and analysing writing, converting between data formats, and pulling readable text back out of pictures.

The technical side of getting a page indexed and shared properly: the tags that decide how it appears in results, the structured data behind rich results, and the files crawlers read before anything else.

The small utilities that come up mid-debug — reading a token, testing a pattern, generating identifiers, tidying a query — without pasting anything sensitive into a stranger's server.

Tools for the part of posting that is fiddly rather than creative — hitting each platform's dimensions, staying inside its character limits, and getting a thumbnail or a still that actually works.

Tools that make something from nothing much: a QR code, a password, a favicon set, a colour scheme, a font pairing, or speech from a block of text.

Video and audio handled in the browser itself, with ffmpeg compiled to WebAssembly — so a large file is never uploaded, and there is no queue behind other people's jobs.