PDFSimpli

App to High Light Documents Or PDF

Highlight documents and PDFs online file comparison

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly

Highlight PDF and document text directly in your browser

No app download or install required — works anywhere

Markup documents quickly and share the results with ease

24/7 multilingual phone, chat and email support | +1-844-898-1076

Upload two files to compare

Drag and drop files here

Highlight PDF and document text directly in your browser

Markup documents quickly and share the results with ease

No app download or install required — works anywhere

24/7 multilingual phone, chat and email support | +1-844-898-1076

Compare PDFs and files with AI in three simple steps

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly

Upload versions

Select and upload the two versions of the document you want to compare

Review changes

Our AI highlights every addition, deletion, and formatting change side-by-side

Export differences

Download a comprehensive report detailing all discrepancies between the two files

Document and PDF comparison tool

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly

Detect changes in text, images, fonts, and small layout shifts
Paragraphs are compared correctly even if they moved pages
Simultaneously compare two PDFs instantly using AI

Detailed comparison results

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly"flicking" between different versions

See added/removed content clearly using AI smart technology
Understand document changes quickly with a change log report
Review legal contract and agreement revisions with confidence

Translate with AI

Document and PDF comparison tool

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly

Detect changes in text, images, fonts, and small layout shifts
Paragraphs are compared correctly even if they moved pages
Simultaneously compare two PDFs instantly using AI

Detailed comparison results

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly"flicking" between different versions

See added/removed content clearly using AI smart technology
Understand document changes quickly with a change log report
Review legal contract and agreement revisions with confidence

Here's why people trust us

An AI-powered writing suite with everything you need

Simultaneously view two files with all discrepancies clearly highlighted

Detect changes in text, images, font styles, and even small layout shifts

Generate a summary report of every deletion and addition between versions

Ensure no "hidden" clauses were changed during the editing and redlining process

Smart alignment technology compares paragraphs even if they moved pages

Eliminate the manual human error of "flicking" between different document versions

Frequently asked questions

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly

How does the "Compare" tool highlight changes?

It uses a side-by-side view with color-coded highlights—usually red for deletions and green for additions.

Can it detect changes in images or just text?

Our tool performs a pixel-by-pixel comparison, meaning it can flag if an image was moved, resized, or swapped.

Is this tool useful for legal contract reviews?

Absolutely. It is the fastest way to see exactly what an opposing party changed in a revised contract or NDA.

Can I export a "Difference Report"?

Yes, you can download a summary report that lists every change made between the two versions of the document.

What if the pages are in a different order?

Our smart comparison can identify when a paragraph has been moved to a different page rather than deleted.

See All FAQs

/* JavaScript disabled: never leave the carousel hidden. */ .ai-solutions-lp-wrapper #big-card-carousel-desktop-view { opacity: 1 !important; }

All you need to
know about PDFs

Stop reading entire reports with AI summarization

Summarize any PDF or document instantly to extract key decisions and data without reading pages

Side-by-side with AI document comparison

Compare two files automatically to catch every change addition and deletion in seconds—not hours

Never format a bibliography manually again with AI

Generate accurate APA and MLA citations instantly to eliminate formatting errors and save hours

Is your work original? Check for plagiarism

Scan any document for plagiarism and catch copied passages instantly with advanced AI matching

Learn how to WorkSmart with us

Never format a bibliography

manually again with AI

Generate accurate APA and MLA citations instantly to eliminate formatting errors and save hours

Is your work original? Check for plagiarism

Scan any document for plagiarism and catch copied passages instantly with advanced AI matching

Stop reading entire reports

with AI summarization

Summarize any PDF or document instantly to extract key decisions and data without reading pages

Side-by-side with AI document comparison

Compare two files automatically to catch every change addition and deletion in seconds—not hours

Highlight documents and PDFs online AI reading tools

Highlight text in PDFs and documents online without an app with our browser-based tool doing it instantly

Highlight documents and PDFs online file comparison

Upload two files to compare

Compare PDFs and files with AI in three simple steps

Document and PDF comparison tool

Detailed comparison results

Translate with AI

Document and PDF comparison tool

Detailed comparison results

Here's why people trust us

All you need to know about PDFs

All you need to
know about PDFs