Every change, in its place
Insertions in green, deletions struck through, substitutions and moves in their own colour, on both sides, with synchronised scrolling.
AIM Compare
What's changed? You'll know in seconds.
Compare two versions of a document, a PDF, a spreadsheet or a text: every insertion, deletion, move and formatting change, highlighted. Plus a DOCX with tracked changes ready to accept or reject.
- DOCX, PDF, XLSX and text
- Detects moved clauses
- Nothing leaves your device
Sound familiar?
What usually happens, and how AIM Compare solves it.
The contract comes back "with small changes" and you don't know which.
AIM Compare marks every insertion, deletion, move and formatting change between the two versions.
A changed amount slips past you among hundreds of lines.
With one click you see only the changes to amounts, dates and deadlines.
A moved clause looks deleted and rewritten.
AIM Compare detects it as moved, even if it was renumbered.
How it works
Getting started is this simple. And this is what you'll see: screenshots of the real app.
Drop in both versions
The original and the revised version: DOCX, PDF with text, XLSX, CSV, Markdown or pasted text.
Review the changes
Side by side or in a combined view, with the list of changes alongside. Jump from one to the next with the arrows.
Export the result
A PDF report, a web page with the changes or a DOCX file with track changes to accept or reject them one by one.
What you can do
Everything AIM Compare does today, told by what it solves for you.
A single view, with everything
The combined view shows the revised document with what was removed and what was added, just as the person approving it would read it.
What matters: figures and dates
With one click, only the changes to amounts, dates, deadlines and numbers written out in words. So a €1,200 that became €1,450 doesn't slip past you.
Visual PDF comparison
For plans, scans or PDFs without text, it compares the image of each page (up to 60 pages) and marks the areas that changed, with its report in PDF.
Several versions in a row
From version 1 to 2 and from 2 to 3, with a summary of how many changes there are at each step.
Detects moved clauses
If a clause moves, it shows as moved, not as deleted and rewritten, even if it has been renumbered or edited inside.
You decide what counts
Ignore capitalisation, spaces, punctuation, numbering or line breaks, and choose whether you care about formatting and style changes.
DOCX with track changes
Download a DOCX file with real revision marks, with their author, to accept or reject each change in AIM Docs or your word processor.
Fast with long documents
Two 200-page documents are compared in under two seconds.
Who it's for
SMEs, freelancers and firms that already work this way.
A firm
The version of the contract the other party sends back, compared with yours: every clause touched, moved or added.
An estate agency
The deposit agreement draft reviewed by the buyer, with the changed figures and dates in plain view.
An accounting firm
Two versions of an accounts spreadsheet, cell by cell per sheet, with new rows.
A construction company
Two revisions of a PDF floor plan, compared visually to see which area has changed.
Works with the rest of AIM
Each app does its own job and hands the work on to the next.
AIM Docs
Open the tracked-changes DOCX file in AIM Docs and accept or reject each change.
AIM LEX (opens on its own site)
Questions about what's changed in a contract? Ask AIM LEX.
AIM Sign
When everything is in order, take the document to AIM Sign.
AIM PDF
If a PDF is a scan without text, run text recognition in AIM PDF first or use the visual comparison.
Privacy and security
What stays on your device, what travels encrypted and what we store. No small print.
Nothing leaves your device
Documents are read and compared in your browser. They aren't sent to our servers.
Recent comparisons
The last 20 comparisons are saved in your browser, with both complete documents, so you can come back to them. You can delete them whenever you like or turn saving off in “Comparison options”.
What the server keeps
Nothing from your documents. No analytics or advertising.
Biomag S.L.U., a Spanish company. Hosted in Amsterdam (EU), with no advertising and no trackers. Read the privacy policy
Free and Pro
Start free, no card. Pro only if you need it.
Free
€0Forever. No sign-up, no card.
- All of AIM Compare's features, no sign-up
Pro
From €1.99€1.99 a month with annual billing, or €2.49 a month paying every 6 months. VAT included, no commitment.
- All of AIM Compare's features, nothing held back on either plan
- AIM Cloud: 50 GB for your documents, from any computer
- Advanced PDF in AIM PDF: OCR, certificate signing, redaction and comparison
Frequently asked questions
What formats does it compare?
Documents (.docx), PDFs with text, spreadsheets (.xlsx), CSV, Markdown and text, up to 80 MB each. HTML, XML, JSON and RTF files are compared as the text of their code, not as they look when opened. If you have another format, open it in AIM Docs or AIM Sheets and save it as DOCX or XLSX.
What if the PDF is a scan?
Use the visual comparison (up to 60 pages per PDF), or recognise the text first in AIM PDF.
Does it work offline?
Yes, once you have opened it once while online: the page and its programs stay in your browser and you can compare without internet.
Can I compare two spreadsheets?
Yes: cell by cell on every sheet, with new rows and the reference of each change.
Are my documents uploaded anywhere?
No. Everything happens in your browser.
What formats does it export to?
A PDF report, a web page with the marked-up document and a DOCX file with tracked changes.
Try it now. It's free.
No sign-up, no card and nothing to install. It opens in your browser in a second.