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Compress an image with a live before-and-after slider and every codec knob exposed. Runs entirely in the browser, so nothing is uploaded.
Opens in a new tab. We do not control this site and it may have changed since we catalogued it.
Squoosh sits in Unreasonably Useful under Learn, and we have it filed as a minute — one quick round, then you can leave. It reads as useful and clever.
Sites that quietly do a job you would otherwise pay for or install software for. Included because being this good for free is genuinely strange.
Paint over whatever is ruining a photo and it fills the gap convincingly. Free at standard resolution with no account.
Translates a cron expression into plain English as you type it, then tells you when it will next fire. Ends a very specific argument.
GCHQ's cyber swiss army knife: chain base64, XOR, hashes and regex into a recipe and watch the data transform at every step.
Paste two blocks of text and get a colour-coded diff back immediately. Also handles PDFs, images and spreadsheets.
Full flowchart, floorplan and network-diagram editor that saves to your own drive and has never once asked anyone for money.
Hand-drawn-looking diagrams that somehow stay legible, with live collaboration and no account. The whiteboard for people who hate whiteboards.
Paste a terrifying shell command and it pulls the whole thing apart, annotating every flag from the relevant man page.
Merge, split, compress, rotate, sign and convert PDFs from a single page. Covers nearly everything Acrobat charges a subscription for.