Every Resizo tool
10 tools and 15 pages set up for one job each, grouped by what you came to do. All of them run on your own device: the file you drop is read, changed and saved by the machine in front of you, and it is never uploaded.
Resize & Crop
Change how big a picture is, or which part of it you keep.
Resize Image
ResizeChange image dimensions with pixel-perfect precision.
- Photograph from a camera or a phone, and you want it smaller without the artefacts showing — Resize a JPG
- Logo, icon or screenshot, where the transparency and the hard edges have to survive — Resize a PNG
- An image saved off a web page, at the wrong size for wherever it is going next — Resize a WebP
Crop Image
CropRemove unwanted areas with exact pixel control.
Resize up to 20 images at once and download them as a ZIP. Bulk Resize
Compress & Optimise
Bring a file under the size a form, an email or a web page will take.
Compress Image
CompressReduce file size without visible quality loss.
- A 20 KB ceiling — signature strips, avatars and thumbnail fields, where the picture usually has to get smaller too — Compress to 20 KB
- A 50 KB ceiling on an application photo or a scan, where the pixel size matters as much as the bytes — Compress to 50 KB
- A form that rejects anything over 100 KB — job portals and government uploads mostly — Compress to 100 KB
- A 200 KB ceiling, which is enough for a full-width photo that still looks right — Compress to 200 KB
Convert
Turn the file you have into the format the other side will open.
Convert Format
Convert formatConvert between JPEG, PNG and WebP instantly.
- A photograph saved as a PNG, many times heavier than it needs to be — PNG to JPG
- Something downstream demands a PNG and will not take the JPG you have — JPG to PNG
- Photos going onto a web page, where 30 percent off every file is the whole point — JPG to WebP
- A transparent graphic that has to get smaller and stay transparent — PNG to WebP
- You saved an image from a web page and now nothing on your computer will open it — WebP to JPG
- A WebP with a see-through background, headed somewhere that will not take a WebP — WebP to PNG
Convert HEIC
Convert HEIC to JPGConvert iPhone HEIC photos to universal JPEG.
- An iPhone photo that Windows, Android and most upload forms refuse — HEIC to JPG
- An editor or a form that names PNG and takes nothing else, from a photo the iPhone saved as HEIC — HEIC to PNG
Forms & applications
A photo or a signature that has to meet a form’s rules: this many pixels, under this many kilobytes, in this format.
Signature Resizer
Signature resizerCrop, size and compress a scanned signature for an online form.
Privacy & Metadata
What a file says about itself — the location and camera it records, the print size it claims — changed or removed without touching the picture.
Change Image DPI
Change image DPISet the print resolution a JPEG or PNG claims, without re-encoding it.
Remove Image Metadata
Remove image metadataStrip EXIF, GPS and XMP from a photo without touching its pixels.
Combine into one file
Several photos or PDFs that have to go out as a single document.
JPG to PDF
JPG to PDFCombine photos into one PDF, in the order you choose.
Merge PDF
Merge PDFCombine several PDFs into one file, in the order you choose.
Guides
Measured on the tools above, with the method printed beside every number.
What happens when a large photo must reach 20 KB
A 1600×1067 synthetic test scene of 393,418 bytes came out of the 20 KB page at 20,111 bytes, and it got there by giving up pixels rather than quality: 524×350 at quality 68, in 1.83 s.
JPEG vs WebP at the same file size
On the photograph-like sample the two formats really did land on the same bytes, and WebP won: 41.22 dB PSNR and 0.9797 SSIM at the 100 KB ceiling against JPEG's 36.98 and 0.9568, and 36.92 and 0.9566 at 50 KB — within 0.06 dB of what the JPEG needed 96.97 KB to reach.