Image Upload Failed? Check Format, Size and Dimensions
Photo upload rejected? Check accepted formats, file-size limits and dimensions, then follow a worked example before retrying a form or checkout.
Quick diagnosis: match the upload error to the fix
For a checkout or application form, copy its accepted formats, maximum file size and required pixel dimensions before editing. There is no universal checkout limit. If the message only says image rejected, compare those three requirements first; do not assume the file needs more compression.
If the form says unsupported format, read its accepted file types and export an actual accepted format. Use JPG for an opaque photo when accepted, or PNG when transparent pixels must remain. A WebP that opens on your device can still be rejected by a form. Renaming the extension does not convert it.
If the error says file too large, check the maximum bytes and use a suitable compression target. If it says dimensions or aspect ratio are wrong, check width and height separately: a smaller file can still fail a pixel requirement. Crop in an editor when an exact ratio is required; this tool resizes proportionally and does not crop.
If the upload never starts, keep the error message and check the receiving service, connection and session. A compressor cannot fix a login failure or service outage. When every stated file requirement is met, stop repeatedly degrading the image and follow the destination’s support process.
A worked upload check: bytes and pixels must both pass
For an illustrative form accepting JPG up to 200,000 bytes and at least 600 pixels wide, a 185,000-byte export at 540 pixels fails the width requirement. A 210,000-byte export at 600 pixels fails the byte limit. These are example measurements, not requirements for any named checkout or results from an independent test.
Start again from the master. Choose JPG, a permitted width and a 200 KB target; disable additional resizing when the width must remain fixed. Inspect the reported dimensions and bytes, then open the downloaded file. If no readable export meets both limits, ask the receiving service which alternative it accepts. Keep your original.
Check that the selected file is the optimized copy
The most straightforward cause is choosing the original after downloading a smaller version. Check the filename and folder. CorvexsDigital adds an optimized suffix, but your device may also add a number if a file with that name already exists. Open the exact copy you select to confirm it is the one you reviewed.
Do not assume a compressed result replaces the source photo in your library. The tool creates a new file and leaves the original unchanged. A file picker that opens your recent photos may not immediately show the browser’s download folder.
Check format and actual contents
A destination might accept JPG and PNG but reject WebP. Export to an accepted format using a real converter. Changing only the filename extension does not rewrite the encoded image and can create another mismatch.
CorvexsDigital checks supported file signatures before processing. HEIC, GIF, SVG, and PDF input are also supported: PDF exports one page as an image and GIF exports a still frame. A damaged file or unsupported codec may still need a different preparation workflow.
Separate file problems from service problems
If a valid file is still rejected, try the service’s documented troubleshooting steps. A timed-out session, temporary outage, connection problem, or account restriction may be involved. Avoid changing a perfectly usable image endlessly when the failure occurs before the service even evaluates it.
Keep the error message and a record of the file’s format, size, and dimensions for a support request. Do not include private images or account secrets unless the service’s trusted support process genuinely requires them.
A clean retry
Return to the original, export one clearly named compatible file, inspect it, and retry once through the normal form. If that works, preserve the known-good export. If it does not, use the remaining evidence to narrow the cause. Compression is useful when bytes are the problem; it cannot fix every reason a service refuses an upload.
Questions & answers
Which photo type and size should I use at checkout?
Use the format and maximum file size shown by that checkout. There is no universal limit. If it accepts JPG, export a real JPG copy, preserve its required dimensions and verify the downloaded file before retrying. A 200 KB target is only appropriate when the checkout permits it.
Why is my iPhone photo rejected when it looks normal?
Check whether the selected file is HEIC while the form accepts only JPG or PNG. Convert to an accepted format, then inspect its actual size and dimensions. A filename extension change alone does not convert the image.
Will changing .webp to .jpg fix rejection?
No. A filename change does not convert the file contents. Export an actual JPG and verify the result.
What if the file meets every stated requirement?
Try the saved export again, check whether the form reports another validation rule, and contact the destination’s support with the exact error. Do not assume further shrinking will help.
Your next step
Check format, bytes, dimensions, and file selection in that order. Keep the original while troubleshooting.
Put this guide into practice
Sources & further reading
Published by CorvexsDigital. Prepared with AI assistance; no independent human testing or professional certification is implied. Examples are illustrative unless identified otherwise. Read our editorial policy or report a correction.