Plans in. Answers out.
Drawing sets and spec books, read sheet by sheet — in your browser, never uploaded.
Drop a PDF on one of the three apps below. Each one runs entirely on your own computer: the file is read in your browser tab, the results are downloaded from it, and nothing is sent anywhere.
Sheetsa Split
Splits a born-digital drawing set into one PDF per sheet, named from each titleblock (sheet number, title, issue date, revision), with an index you can correct before you download.
Open Split →
Sheetsa Archive
Restores a faded, low-contrast old scan — levels, sharpening, optional black and white — and reads its text with multi-pass OCR that says how sure it is. Also checks a PDF against PDF/A for long-term filing.
Open Archive →
Sheetsa Specs
Indexes a project manual by CSI MasterFormat section and, if you want, splits it into one PDF per section with a front-matter file for the cover and table of contents.
Open Specs →Which one do I use?
- A set plotted from CAD or Revit (crisp text you can select) Use Split. It reads the text layer; it never guesses at pixels.
- A scanned or photocopied set (fuzzy text, a picture of a page) Use Archive. Split flags those pages as "Needs Archive" instead of reading them wrong.
- A spec book or project manual Use Specs. It looks for the "SECTION 03 30 00" header that starts each section.
How your files are handled
- Nothing is uploaded. Every page is processed in your browser. The apps also work offline once you have opened them online once.
- Your work stays on your device. Split keeps your current project in your browser's own storage so you can resume after closing the tab; clearing this site's data removes it.
- Automatic reads can be wrong. Every value shows how it was read — Observed, Confirmed, Inferred, or Verified by you — and you can correct any of them before you download. Check the output before you rely on it.
- Big sets. A very large set can run out of memory in a browser tab. The same engine runs as a local server on your own machine for those; see the README.
Questions or problems
Write to support@sheetsa.com. Say which app, what kind of file, and what you expected to happen; a copy of the sheet index or the status line is more useful than the drawing itself, and please do not send a client's set.
Free to use as-is, with no warranty; see the terms of use. Sheetsa bundles open-source components (pdf.js, pdf-lib, tesseract.js and its language data) under their own licenses.