Resize, compress and convert images without uploading them
Drop an image below to resize it, or pick another tool. It is processed on your own device — nothing to install, nothing to upload.
JPEG, PNG, WebP · up to 20 MB
Or open the resize tool first and set a size.
Your image never leaves your device — the work happens here, in this browser tab. No account, no watermark.
Every Resizo tool
7 tools, each doing one job with the controls that job actually needs. All of them take the same file and all of them hand it straight back.
- Resize
Resize Image
Type exact pixel dimensions, scale by a percentage, or tap a platform size such as 1080×1080. The aspect-ratio lock fills in the side you did not type.
- Compress
Compress Image
Aim at a byte target — 100 KB for a form that rejects anything larger, a few MB for an email — and see exactly what you got.
- Convert HEIC to JPG
Convert HEIC
The iPhone photo that Windows, Android and half the upload forms on the internet refuse to open, turned into a JPG.
- Convert format
Convert Format
JPEG, PNG and WebP, in any direction.
- Crop
Crop Image
Trim to exact pixel coordinates.
- JPG to PDF
JPG to PDF
Photos into one PDF, in the order you set. Page size and orientation are chosen per image, so a portrait scan and a landscape photo both come out the right way up.
- Merge PDF
Merge PDF
Several PDFs into one file. Reorder them first, and take every page or only the ones you name.
What you get
No sign-up, nothing kept, no catch. Here is exactly what that means.
Nothing is uploaded
The image is opened, changed and saved by your own device. It is never sent to us, so there is nothing for us to hold.
No account, ever
Every tool works signed out. There is nothing to sign up for and nothing to log in to.
Free, no watermark
No paid tier, no export limit, and nothing stamped on the image you get back.
The formats forms ask for
JPEG, PNG and WebP, plus the HEIC and HEIF an iPhone shoots.
No waiting on a transfer
The file is already where the work happens, so a 20 MB photo starts immediately even on a slow connection.
Bounded by your device
A very large image needs memory to open. The panel checks what this device can spare first and says so if a job will not fit.
No metadata in the output
Files are written from raw pixels, so EXIF and GPS data are gone — a photo no longer says where it was taken.
Which tool do I need?
Most of the time the answer comes from the message that sent you here. If a form says the image has to be a certain number of pixels wide, that is a resize. If it says the file has to be under a certain number of kilobytes, that is a compress — the dimensions can stay exactly as they are and the file still gets lighter.
If the upload is refused with something about the file type, that is a convert: a surprising number of forms still take JPEG and PNG only. If the picture is right but the framing is not, that is a crop. And if you took the photo on an iPhone and nothing will open it at all, that is HEIC, which is its own tool because it is its own problem.
Jobs stack. A 12-megapixel phone photo headed for a job application usually wants a resize down to something sensible, then a compress to hit the byte limit. Doing it in that order gives a far better-looking result than compressing a huge image hard enough to squeeze under the cap on its own.
What happens to your file
The honest version, because plenty of sites in this category describe something else. When you open a tool, the page brings the image software down with it — the same decoders and encoders a desktop program would use, compiled to run inside a browser. Your picture is then read where it already is, changed, and written back out by the machine in front of you. It is not sent to Resizo, and there is no copy of it anywhere else to delete.
Two things follow from that. The file you download is built from raw pixels, so the EXIF block goes with the original: no camera, no timestamp, no coordinates. And the limits are your device’s rather than ours. Opening a big photograph needs several times its file size in memory, so the tool works out what this machine can spare before it starts, and says so plainly instead of freezing the tab. The published cap is 20 MB per file; a phone with very little memory free may draw the line lower, and will tell you where.
Why it is free
Resizo is a free, non-commercial project. There are no ads, no paid tier, no export limit and no watermark, so there is nothing to unlock and no reason for the tools to be deliberately worse than they could be.
It also costs very little to run, which is part of the answer. Your device does the image work, so there is no processing bill that would have to be recovered from you somehow. Nothing on the page is trying to sell you anything or track you across the web. The tools are the whole product.
Frequently asked questions
Is Resizo free?
Yes — every tool, with no account, no watermark on the output and no daily quota. Resizo is a free, non-commercial project: there is no paid tier holding a feature back, no ads, and nothing here asks for a card.
Do my images get uploaded anywhere?
No, and there is nowhere for them to go. Opening a tool loads the image software into the page, and the picture is then read, changed and saved by your own device — it stays on the machine you are sitting at, so there is nothing for us to receive, keep or hand on. The file you download is also written by your device, and it carries no EXIF or GPS data, so it no longer says where the photo was taken.
Do I need an account?
No. There are no accounts on Resizo at all — nothing to sign up for and nothing to log in to. Every tool works the same for everyone, and because nothing is kept, there is no history to look back on and nothing tying your use to a name.
Does this work on a phone?
Yes. It is a web page, so it runs on iOS, Android, Windows, macOS and Linux with nothing to install. The HEIC tool exists precisely because iPhone photos are the ones other devices refuse to open. One honest caveat: since the phone does the work itself, a very large image takes longer on an older handset, and one that will not fit in the memory the browser can spare is refused with a message rather than crashing the tab.
What are the size limits?
20 MB per file and 8000 pixels on the longest side. A batch takes 20 images and 80 MB in total. There is no daily quota and nothing counting how often you use it. The real ceiling is your own hardware: a very large photo needs a lot of memory to open, and the panel works out whether this device can hold the job before it starts rather than failing part way through.
Which formats are supported?
Resize, compress, crop and convert all take JPEG, PNG and WebP, and the HEIC tool takes the HEIC and HEIF files an iPhone produces. Output is JPEG, PNG or WebP. AVIF and GIF are not accepted: there is no decoder for either one here, so a file in those formats would be refused rather than quietly turned into something else.