A PDF upload stuck at 99 percent has usually finished sending and is waiting for the server to answer, while an upload stuck near zero is usually a connection or browser problem. Check the network, the file size, browser extensions and whether the computer went to sleep, then retry once with a fresh copy of the PDF.
Is a PDF upload stuck sending, or stuck processing?
A stuck PDF upload is in one of two places: the file is still travelling to the server, or it has arrived and the server is working on it. A bar that freezes early points to sending. A bar that sits at 99 or 100 percent usually means the bytes are delivered and the wait is on processing.
Many upload bars measure only the transfer. They fill as your browser hands the file to the network, and they cannot see what happens after the last byte leaves. A converter then has to read each page, which can take longer for a scan or a long file. The bar has nothing left to show, so it parks at the end.
Here is how to tell the two apart without guessing:
- Watch the number move. If it rises slowly and then stops for minutes at the same low value, the transfer has stalled.
- Look for a second stage. A converter that shows a separate status line, such as reading pages or checking balances, has moved past the upload.
- Check the file type. A scanned statement takes longer to process than a digital one, so a pause at the end is more likely to be real work.
If the processing step runs too long, the server may give up and report a timeout. A PDF conversion that timed out is a separate problem with its own fixes, such as splitting the file.
Connection checks for a stalled PDF upload
A stalled PDF upload is most often a network that dropped or slowed after the transfer started. Uploads use the slower direction of most home and mobile connections, so a file that downloads in a second can take much longer to send. Confirm the connection is alive, then make the file lighter or the network steadier.
Run through these checks in order:
- Open a new tab and load any page. If it hangs too, the connection is the problem, not the converter.
- Move closer to the Wi-Fi router, or switch from mobile data to Wi-Fi, or the other way round.
- Turn off a VPN for a moment if your work allows it. Some VPNs slow uploads or drop long ones.
- Pause other uploads, such as cloud backups or photo sync, that compete for the same bandwidth.
A large scan makes every one of these worse, because it gives the connection more chances to fail. If you are on a hotel, train or shared network, uploading a PDF on a slow connection explains how to shrink the file and pick a better moment to send it.
Browser extensions and busy tabs that freeze a PDF upload
The browser can freeze an upload even when the network is fine. Extensions that inspect page traffic, such as ad blockers, privacy tools and some security add-ons, may interfere with the request. A browser short on memory from dozens of open tabs can stop updating the page, so the bar looks stuck.
Try a private or incognito window first. Most browsers turn extensions off there by default, so a clean upload in that window points straight at an extension. Then switch extensions back on one at a time in a normal window to find the one responsible.
Two smaller causes are worth ruling out:
- An outdated browser. Update it and restart. Old versions can mishandle large file requests.
- A sleeping tab. Some browsers put background tabs to sleep to save memory. Keep the converter's tab in front until the upload finishes.
Does sleep or a locked screen stop a PDF upload?
Sleep usually stops a PDF upload, and a locked screen can too. When a laptop sleeps, it drops its network connection, and the transfer cannot resume where it left off. On phones, locking the screen or switching apps can pause the browser in the background, so an upload that looked fine stops while you are away.
Keep the device awake for the few minutes an upload takes:
- On a laptop, plug it in and set sleep to a longer delay while you work through a batch.
- On a phone, keep the browser open and on screen until the upload and the conversion both finish.
- Do not close the lid to carry a laptop to another room mid-upload.
When a device wakes up, the page may still show the old progress bar as if nothing happened. Reload the page rather than waiting on a transfer that has already died.
Retrying a stuck PDF upload with a fresh copy
Retry a stuck PDF upload once the checks above are done, and retry with a fresh copy of the file instead of the same one. Cancel the upload, reload the page, and choose the PDF again. If the second try stalls at the same point, the file itself is likely too large or damaged.
When to wait and when to cancel
Give a scanned or long statement a few minutes at the end of the bar before cancelling, since it may be processing. Cancel straight away if the bar has not moved at all for several minutes near the start.
Why a fresh copy helps
A file still syncing from a cloud folder, or one saved from an email preview, can be incomplete on disk. Download the statement again from your bank, or save the email attachment to a local folder first, and upload that copy. If the file opens slowly or shows errors in your PDF reader, it may be damaged, and no number of retries will fix it.
After the upload goes through
Once the file converts, open the result in the program you use. Mac users who choose CSV can open the CSV in Numbers with dates and amounts kept as real values. FastBankConvert, which is getting ready to open, puts a timer on screen that shows how long each conversion took, and its sample run walks through the reading stages one at a time; Get started to hear when trial conversions begin.