Free tool · Open source (MIT) — Studio project, 2026
Mendery
Drop a corrupted .docx, .xlsx, .pptx, .odt or SQLite file and get your text back — recovered entirely in your browser. Nothing is ever uploaded. Free for everyone.
Drop a corrupted .docx, .xlsx, .pptx, .odt or SQLite file and get your text back — recovered entirely in your browser. Nothing is ever uploaded. Free for everyone.
The file is corrupted. The words are usually still in there.
When Word says a document is unreadable, most of the text is typically intact — the container is broken, not the content. Mendery scans the raw bytes of corrupted Office documents for local file signatures, keeps whatever partial DEFLATE output can be salvaged, and rebuilds an openable .docx. It does the same for damaged SQLite databases, scavenging surviving pages directly.
All of it happens in the browser. Your broken thesis, your accounts, your client files — none of it is uploaded, because the page’s security policy makes transmission impossible. MIT-licensed, free for everyone.
Recovery tooling is a trust cliff — people hand you their most important broken file. So the architecture removes us from the loop entirely.
Recovers readable text from broken .docx, .xlsx, .pptx and .odt files and rebuilds a fresh, openable document around it.
Page-level scavenging pulls surviving records straight out of damaged database files — to our knowledge the first fully in-browser recovery of corrupted SQLite.
The CSP declares connect-src ’none’: the browser itself forbids the page from transmitting anything, anywhere.
Real format engineering: the kind where you read the ZIP spec twice and the crash dumps three times.
ZIP recovery parses local file headers directly and ignores the corrupted central directory — the part of the file that usually dies first.
We vendored MIT-licensed fflate instead of the native DecompressionStream, because the native API discards its queued output when a stream errors mid-way — which is precisely the moment recovery matters.
The test oracles are real tools — textutil and node:sqlite verify that recovered files actually open, not merely that bytes were produced.
Mendery is deep, unglamorous engineering given away: MIT-licensed, free, and structurally incapable of reading your files. The best compliment it gets is silence — a document opens, and someone’s day un-ruins itself.