About Resizly
Resizly is a bulk image resizer that runs entirely in the tab it is open in. It exists because the job it does — a folder of photos, several sizes each, consistent names, one archive at the end — is a job people either do one file at a time or write a script for, and there was no good free thing in between.
Why it is a pipeline and not a form
A form asks for a width and gives you a file. That is a fine shape for one photograph and the wrong shape for two hundred, because the interesting decisions in a bulk job are not the numbers — they are which files a setting applies to, what the outputs are called, and what happens when two of them want the same name. Those are rules, so the tool is built out of rules.
The consequence is the screen nobody else builds: a table of every file that will be written, with its name and its size, before anything runs. A bulk job that produces the wrong six hundred files has cost more time than doing it by hand, and the only way to avoid that is to be able to read the answer before paying for it.
Why the name means nothing
Every other tool of this kind is named after the thing it does. Resizly is not, and that is a deliberate trade: less traffic from people typing the job into a search box, and a name that can be typed from memory once it has been used. If you are here because someone sent you the link, that trade has worked.
What it does not do
The list is longer than the list of what it does, and that is the point. This is one tool for one job, and every one of these belongs to something else:
- One image and two numbers. That is a different tool and it is faster at it.
- Percentages, factors, centimetres and anything to do with printing.
- Reconstructing detail in a small image so it can be made larger.
- Changing an image’s shape by inventing new edge pixels.
- Hitting a byte count. Resizly sets an encoder quality; it does not search for a file size.
- Putting a mark on three hundred product photos.
- Cropping decisions. Cover crops as arithmetic against an anchor and never opens a handle.
Who builds it
Resizly is part of a small group of single-purpose image tools built by the team behind PictureEditor.com. They share an engine, a set of privacy rules and a performance budget; they share no content, and each one is written for its own job. The endorsement line in the footer is the only place that connection appears.
It is a web page, and web pages have ceilings
Everything here runs on your own processor inside a browser tab, which means it is bounded by what that tab is allowed to hold. A shell script on the same machine will always be faster, a phone will always manage fewer files than a laptop, and a folder large enough will eventually be too large. Where those edges are is written on the front page rather than discovered at file 140.
The tool is on the front page. What it stores, and what it does not, is on the privacy page.