Keep the task and the tool separate
The receiving service decides what it accepts. Make My Files Work can help measure and prepare supported files, but it does not control that service’s account permissions, content checks or application rules. A useful result narrows the technical problem; it is not a replacement for reading the actual upload instructions.
If you already know the operation, use its dedicated page. If you only know that an upload failed, begin with a compatibility check and the exact error wording. Several file changes at once make it harder to identify which one helped, so keep the source and work from a clear reason for each adjustment.
Use the original as your reference
Keep the source until the submission is complete. The tools create separate downloads and do not overwrite the file you selected. That gives you a way to compare quality, recover the intended pages or choose another format without making repeated changes to an already altered copy.
On a phone, check where the download was saved and which version the picker selects. A group of near-identical thumbnails can conceal a different format or an older copy. Open the saved output when needed, rather than relying on a filename ending or a preview alone.
Know what a result cannot establish
A file can satisfy a technical limit and still be the wrong document. Review required pages, small writing, photo composition and any restrictions on editing. The output checks do not know why a document is being submitted or whether the contents answer the receiving organisation’s request.
For confidential or official material, use the process your organisation requires. Local processing describes where this operation runs, not a general security certification. Do not treat a file signature check as an antivirus scan or a metadata operation as proof that a photograph is anonymous.
Choose the relevant answer by the result you see
| Result | Useful next check |
|---|---|
| Unsupported input | Confirm the real source format and the formats handled by that particular operation. |
| Target cannot be reached | Review the compression method and source export; do not assume the requested size was achieved. |
| Checks passed but upload failed | Investigate the receiving form, sign-in session, permissions and any rules that were not measured. |
| Downloaded file looks wrong | Return to the original and inspect the selected pages, background or dimensions before another attempt. |
Questions that come up
Which file formats can I use?
The inspector recognises JPG, PNG, WebP, GIF, HEIC and PDF signatures. Each processing operation supports a narrower set, stated on its page. Recognising a format does not mean every variant can be decoded or converted. Choose the tool for the actual source format, and use a suitable export from the original application if that source is unsupported.
Are the file limits the same as the receiving website’s limits?
No. Make My Files Work’s current per-file input cap is 25 MiB. Supported batch workflows also limit the selection to 12 files and 50 MiB combined. Image, PDF-page and output budgets impose other boundaries. The receiving service can set completely different requirements, which you need to enter or check separately.
Does the maximum-MB field use exactly one million bytes?
The current maximum-MB input uses 1,048,576 bytes per entered unit, which is the binary MiB convention. Some receiving sites mean decimal megabytes instead. Check the stated rule and leave enough margin below a hard maximum. Rounded size displays can also hide a small difference near the boundary.
Why can a small file still fail to process?
Stored bytes do not describe the entire workload. A highly compressed image can decode into a large number of pixels, while a PDF can contain complex page structures. Unsupported variants, incomplete downloads and resource limits can also cause failure. Read the message and check the source rather than assuming the failure proves the file is corrupt.
Will a passing compatibility report guarantee my upload?
No. It describes the supported measurements compared with the rules you supplied. A remote service may apply additional content, permission or structural checks. If the file matches the known rules but still fails, investigate the form session and current platform guidance before repeatedly changing a file that already fits.
Does the PDF compressor reduce the resolution of scanned pages?
The current operation uses lossless repacking and does not deliberately downsample the scan images. Some documents shrink and others do not. A large scanned PDF may need a better export or scan setting in its original application. The standalone compressor reports when repacking does not reduce the file. The separate size-target tools refuse an output that misses the selected threshold.
Why is my converted photo larger than the original?
Different formats store pictures differently. A JPEG made from HEIC or WebP can be larger, and a photographic JPEG often grows when saved as PNG. Measure the downloaded file rather than expecting conversion to compress it. If a size limit also applies, treat that as a separate requirement and inspect the final image after any reduction.
Can JPG-to-PNG make a background transparent?
No. The JPEG’s background is already part of its ordinary pixels. Saving those pixels as PNG does not identify and remove them. Use original transparent artwork or an appropriate image editor when a cut-out is required. Converting a JPEG back to PNG also cannot restore detail discarded in earlier compression.
What should I do if the download cannot be found?
Check the browser’s download list and the destination folder selected by your device settings. Open the result from that saved location and note its filename. The website does not provide an account file history or a server archive of your processed documents. Save the output before leaving the page, and keep the source for another attempt if necessary.
Is the ZIP from batch compression ready for every upload form?
No. ZIP is a download container for the processed group. Many forms require PDF or image attachments in separate fields and will not accept an archive. Extract the ZIP, inspect the documents and select the relevant files. Only submit the archive itself when the receiving instructions explicitly allow it.
Can these tools remove a PDF password?
The current PDF processing workflow refuses encrypted PDFs rather than attempting to remove their protection. If you are authorised to use the document, obtain a suitable unprotected copy through its original application or the organisation that supplied it. Renaming the file or repeatedly trying the compressor does not resolve encryption.
Does local processing mean my document is never sent anywhere?
During these tools’ processing operations, selected source content stays on your device rather than being uploaded to a Make My Files Work conversion server. If you later attach the result to another website or send it by email, that is a separate transfer you control. Your browser and device settings also determine where saved downloads reside.
Why do page numbers in an extraction feel wrong?
The selection refers to positions in the PDF file. A cover, unnumbered sheet or contents page can make those positions differ from printed page numbers. Check the original in a viewer, select the intended positions and open the output. A valid extracted PDF can still contain the wrong pages if the selection was mistaken.
What should I send to the receiving service if the file still fails?
Keep the exact error wording, the name of the upload field, the file’s actual format and its measured size. Explain whether you tried a fresh signed-in session. Those details help the receiver investigate. Do not send confidential documents to an unrelated support address simply to demonstrate the problem; follow the organisation’s approved route.