"Excel found unreadable content" — what it means and how to fix it.
Excel showed "Excel found unreadable content in 'file.xlsx'. Do you want to recover the contents of this workbook?" because it could not parse part of the workbook package. Upload that .xlsx and see the sheets, row counts, and masked cell sample recovered from a rebuilt copy. A one-time $14 — and only if the repair works.
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Recovering what we can.
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Here's what we recovered.
Review the recovery summary before checkout.
Your files auto-delete — delete them sooner anytime
No person looks at your file as part of repair
Repair your file
Choose a supported file to see what can be repaired before checkout.
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You preview before you pay. If the download is materially worse than the preview you approved, we'll refund you.
Try another fileGood news — your file isn't damaged. No charge.
There's nothing to repair. If it still looks broken, the issue may be the player, codec, or viewer on your device rather than the file itself.
We couldn't recover this one.
The file is too damaged to rebuild, so there is nothing to preview and no charge.
Have another clip from the same device?
A healthy video recorded on the same device — ideally the same settings — gives the repair engine a template to rebuild from. It can unlock repairs that fail on their own.
Unrepaired files are kept encrypted for up to 30 days, then deleted.
FileFix can't fix that kind of file yet.
Right now we repair video, audio, document, and image files (MP4, MOV, M4V, MKV, AVI, TS, MTS, M2TS, MPG, MPEG, VOB, 3GP, WebM, FLV, M4A, WAV, MP3, AAC, FLAC, OGG, AIFF, XLSX, DOCX, PPTX, ODT, ZIP, PDF, AI, HEIC, and HEIF). We're adding support for more formats over time.
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FileFix can often repair this kind of damage if the file is recoverable.
Why this happens
The "Excel found unreadable content" dialog means Excel recognized an .xlsx workbook but found a package member or XML structure it could not read consistently. The problem can be in a worksheet, the shared-string table, a relationship, or the ZIP records around those parts.
Choosing Excel's own recovery prompt may produce a usable file, but it can also remove the part it could not parse. Work from a copy and inspect any recovery log Excel provides. If Excel still cannot open the workbook, FileFix uses a different path: it scans surviving ZIP members, repairs worksheet and shared-string XML, rewrites the package, and validates the rebuilt workbook.
The free summary is generated from that rebuilt .xlsx. It names the sheets and rows the validator can read; it does not imply that a missing worksheet, formula, style, or embedded object was recreated.
What we can and can't recover
We can usually fix
- Files that show "Excel found unreadable content"
- Files Excel calls an invalid format or extension
- Workbooks cut off mid-save or mid-transfer
- Files that show the right size but won't open
We can't fix
- Password-protected/encrypted workbooks
- Genuinely empty (0-byte) files
- Deleted or formatted files (that's data recovery, a different job)
- The old binary .xls format (this repair is for .xlsx)
How it works
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Upload Drop the file in. It uploads over an encrypted connection. The repair runs automatically — no person looks at your file.
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Free Recovery Summary You see exactly what we recovered — sheet names, row counts, and a small sample.
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Pay & Download If the summary shows what you need, unlock the repaired Excel file for a one-time $14.
You see a recovery summary built from your actual file before you decide anything — so you never guess.
See what's recoverable.
Free recovery summary · private & auto-deleted
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Questions
You can try Excel's built-in recovery on a copy of the file. Save any result under a new name and check the recovery log and important cells. If Excel cannot complete that recovery, upload the untouched copy to FileFix.
That message means Excel discarded or rewrote package content it could not parse. The named record in Excel's log helps identify what changed; FileFix's summary instead reports what its independently rebuilt workbook contains.
No. The uploaded original is used as input, and the engine writes a separate repaired .xlsx file.