Fix a file error, starting from the message
When a file won't open, the software usually tells you why — a code like 0xc00d36c4, a line like "moov atom not found", a flat refusal that the folder "is invalid". Each page below starts from that exact text, explains what actually causes it, and diagnoses your file for free before any repair.
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Why the message matters
The same symptom — "it won't open" — has very different causes, and the error text is the fastest way to tell them apart. A missing index reads differently from a truncated download, and both read differently from a file that's simply in a format your player can't decode. Matching the exact message means the page can be honest about whether repair is even the right move: some of these errors are corruption we can rebuild, and some are a codec gap or a wrong extension, which no repair should pretend to fix.
Find your message below, grouped by the kind of file it came from. If you'd rather browse by format or by the device that produced the file, use therepair-tools index instead.
Errors by file type (19)
Video
- Video won't open after the camera diedmoov atom not found / truncated MP4
- Windows can't play your videoerror 0xc00d36c4
- Windows says the file isn't playableerror 0xc10100be — Movies & TV
- Windows can't play video · 0xc00d52120xc00d5212 · "This item was encoded in a format that's not supported"
- DaVinci Resolve "Media Offline" — clip present but won't decodeDaVinci Resolve Media Offline · MP4/MOV (ISO BMFF) · H.264/HEVC · missing moov / VFR
- ffmpeg can't parse the video containerInvalid data found when processing input
- MP3 won't play / frame sync lostMPEG frame sync 0xFFE lost · ID3 junk
- Premiere import fails: "no audio or video streams" / codec unsupportedAdobe Premiere Pro import error · MP4/MOV (ISO BMFF) · H.264/HEVC · missing moov
- WAV reads as corrupt / RIFF header brokenWAV/RIFF · 'fmt ' + 'data' chunks · 44-byte header rebuilt · PCM copied verbatim
Archives & folders
- Windows won't open the zipped folder“the Compressed (zipped) Folder is invalid”
- Drive/Dropbox archive won't open after an interrupted downloadZIP/RAR/7z · interrupted cloud download · truncated (missing PK\x05\x06 EOCD) vs bit-rot (CRC-32 mismatch)
- Archive is truncated / ends earlyUnexpected end of archive
- ZIP download cut off before it finishedZIP · .zip/.crdownload/.part · missing central directory (EOCD, PK\x05\x06)
Documents & spreadsheets
- Excel says it can't open the file“file format or extension is not valid”
- Acrobat: "The file is damaged and could not be repaired"Adobe Acrobat/Reader · PDF · damaged xref / trailer / startxref · truncated tail
- PowerPoint won't open a damaged .pptx"PowerPoint found a problem with content in [name].pptx"
- SQLite: "database disk image is malformed"SQLite · .db/.sqlite/.sqlite3 · SQLITE_CORRUPT (11) · malformed b-tree page or pointer
- Word offers to recover a damaged .docxWord found unreadable content in <name>.docx
Don't have an exact error?
Browse by format or device
If you know the file type or the camera, drone, or app that made it, the repair-tools index is organised that way.
Ask a person
Can't match your message to anything here? Thecontact page reaches the maintainer directly — include the exact error text and what you were doing.