How to crop an image with OnyxPDF
- Drop your photo into the tool.
- Drag the crop box over the part to keep; pick an aspect preset if you need an exact ratio.
- Check the live size readout.
- Click “Crop” and download the cropped image.
Why do it in your browser instead of uploading?
- Full-resolution cropping — the box selects from the original pixels, never from a preview downscale.
- Passport ratio (35:45) built in, pairing with the Passport Photo Maker for ID photos.
- No 1-file-per-task free limit.
- The selection survives mouse-up — drag, adjust, then confirm (a small detail many crop tools get wrong).
Good to know (honest limits)
- Cropping discards the outside of the box in the output copy — keep your original photo.
- It crops rectangles; for circles and rounded corners use Circle & Rounded Crop.
Frequently asked questions
What aspect ratio do I need for a passport photo?
35×45 mm, i.e. a 35:45 (7:9) ratio — it is one of the presets here. For a finished, print-ready ID photo at exactly 413×531 px, use the Passport Photo Maker.
Does cropping lower the resolution of the kept area?
No. The kept region is copied at original pixel quality; its pixel size is simply the size of your box.
Can I crop several photos the same way?
Crop settings apply per photo in this tool; for identical framing on portraits, the Passport Photo Maker’s guide overlay helps keep faces consistent.
Are my photos uploaded?
No. Cropping is a local canvas operation in your browser.