Reviewing a contract means marking the parts that matter: the clauses you accept, the ones you want changed, and the terms you need a second opinion on. FixTools gives you a clean way to do that on the PDF itself. Upload the agreement, read through it in the page preview, and drop colored highlight boxes on the clauses you want to flag. The four colors let you separate concerns, so you might use green for terms you are happy with, red for clauses that need pushback, yellow for anything to clarify, and blue for points to raise with a colleague. Add a note to any highlight to spell out the change you want. When the review is marked up, the file uploads over an encrypted connection, the highlights are written into the pages, and the annotated contract downloads ready to send to the other party or your legal contact. The uploaded copy is deleted after processing, so the terms are not left sitting on a server afterward.
Flag clauses in color to separate concerns
Add notes to spell out the change you want
Works on scanned contracts as well as digital ones
PDF Tool
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🚀Open Highlight PDFFree tier · No account · Limits shown before processing
A marked-up contract is only useful if the other side can follow it. Color-coding the clauses means your counterpart, or your own legal contact, can see the shape of the review before reading a single note: the reds show where you want changes, the greens show what is settled, and the notes explain the specifics. That is far quicker to act on than a plain list of clause numbers.
Because a contract carries pricing, obligations, and sometimes confidential terms, it is worth knowing how the file is handled. FixTools uploads the document over an encrypted connection, applies your highlights on the server, and deletes the uploaded copy after processing, so the agreement is not left stored anywhere afterward. For an extra layer before you send the marked version on, you can password protect it so only the intended reader can open it.
Upload the contract, then click each clause you want to flag and drop a colored highlight. Use different colors for accept, push back, and clarify, add notes, and download the marked-up agreement.
Step-by-step guide to highlight a pdf for contract review:
Open the tool
Launch FixTools Highlight PDF in your browser. No account is needed.
Upload the contract
Choose the agreement PDF from your device, digital or scanned.
Flag the clauses
Click each clause you want to mark, drop a colored box, and size it to cover the relevant text.
Color-code and note
Use different colors for accept, push back, and clarify, and add a note explaining each flag.
Download the marked contract
Process the file and download the annotated agreement. The uploaded copy is deleted afterward.
Common situations where this approach makes a real difference:
Vendor agreement
A procurement manager flags the liability and termination clauses in red before sending the contract back with requested changes.
Freelance contract
A freelancer highlights the payment terms and scope in different colors to raise two specific points with the client.
Lease review
A tenant marks the clauses they want explained and forwards the annotated lease to a family member for advice.
Legal handoff
A founder color-codes an agreement and passes the marked PDF to counsel so the review starts from clear flags.
Get better results with these expert suggestions:
Keep a consistent clause code
Use the same color for "needs change" on every contract so your reviews are predictable to work with.
Explain the change in the note
A highlight shows where, but a short note on each one shows what you actually want changed.
Protect before sending
For a sensitive agreement, password protect the marked file so only the intended reader can open it.
Batch a set of similar contracts
If you are flagging the same clause across several agreements, mark them together in one batch.
More use-case guides for the same tool:
Other tools you might find useful:
Add Comments to PDF
Write out proposed changes next to your highlights.
Sign PDF
Sign the agreement once the terms are settled.
Password Protect PDF
Lock the marked contract before sharing it.
Highlight a PDF on iPhone
Highlight a PDF on iPhone in Safari for free. Tap to drop colored highlight boxes on any page, add a note, and download. No app to install, works in Safari.
Highlight a PDF in Different Colors
Highlight a PDF in yellow, red, blue, and green to color-code your markup. Place colored boxes on any page, add notes, and download the file free. No account.
Highlight a PDF on Android
Highlight a PDF on Android in Chrome for free. Drop colored highlight boxes on any page, add notes, and download the marked file. No app to install needed.
Highlight Multiple PDFs at Once
Highlight several PDFs in one batch. Upload the files, place your highlights, process them together, and download each result. Uploaded securely, deleted after.
Highlight a PDF on Mac
Highlight a PDF on Mac in any browser, free. Drop colored highlight boxes exactly where you want, add notes, and download. No Preview limits, no install.
Highlight a Scanned PDF
Highlight a scanned PDF even with no selectable text. Place colored highlight boxes by position on any image-based page, add notes, and download it free.
Open Highlight PDF to review its free limits and processing method.
Open Highlight PDF →Free tier · No account needed · Transparent limits