Compare documents
Upload 2–8 PDFs of the same kind. DockDocs reads them in your browser, then lines up the key terms side by side — with the source line behind every value.
Drag & drop PDFs here
Read locally — your files never leave your device. Field extraction runs on our server.
Coming next
- · A sourced recommendation (which option wins, and why)
- · Click any value to jump to the exact spot in the original PDF
- · Add your own dimensions to compare
Compare documents — FAQ
How do I compare documents?
Upload 2 to 8 PDFs of the same kind — quotes, invoices, or contracts — then pick the type and click "Compare fields". DockDocs lines up the key terms (price, delivery, payment, warranty, and so on) side by side in one table, with the exact source line behind every value. You also get a sourced recommendation for which option wins, and you can ask one question across all the documents at once.
Are my files uploaded to your server?
No — your PDFs never leave your device. DockDocs reads them right in your browser to pull out the text. Only that extracted plain text (not the file itself) is sent to our server, where the AI extracts and aligns the fields. So the document, its layout, and any embedded data stay local; what travels is the words on the page.
Why does my PDF say "Not recognized (likely scanned — needs OCR)"?
That means the PDF has no selectable text layer — it's usually a scan or a photo of a page, so there's nothing to read. Click "Extract text with OCR" on that document and DockDocs will run OCR in your browser to recognize the text (the first few pages), then you can compare it like any other file. Encrypted or password-protected PDFs also can't be read until they're unlocked.
What do I get back, and can I trust the values?
You get a comparison table where every cell shows the value plus the exact source line it came from — and that line is verified to actually appear in your document, so nothing is invented. Click any source line to jump to a highlighted snippet of the original text. If a document simply doesn't state something, you'll see "Not recognized" rather than a guess. One caveat: the overall recommendation is the AI's reasoning over those numbers and isn't individually source-checked, so confirm the figures in the table before you decide.
Is there a limit on file count or size?
You can compare up to 8 PDFs at a time, and you need at least 2 readable ones for the comparison to run. For the "ask across documents" feature, the combined text of all documents must stay under 60,000 characters and your question under 500 characters — if you hit that, use fewer or shorter documents. The tool needs an internet connection, since the field extraction and recommendation run on our server.
Is it free?
Yes — you can upload your PDFs, run the side-by-side comparison, get the recommendation, and ask questions across your documents. The in-browser OCR for scanned files is free too, since it runs locally on your device. The comparison engine is in beta, so behavior may keep improving.