Can I change the color and opacity of my highlights?

Yes. You can select custom colors and line thicknesses to differentiate comments, revisions, and approval markings.

Can I remove or undo annotations before saving?

Yes. Every annotation action supports full multi-level undo and redo, allowing you to revise your work before exporting.

Does adding annotations alter the original document text?

No. Annotations exist as independent vector and image layers, leaving the underlying text and document geometry intact.

Can other PDF readers view my annotations after export?

Yes. All annotations adhere to standard PDF specification standards and display correctly in Adobe Acrobat, Apple Preview, and mobile PDF apps.

Annotate, Highlight & Draw on PDFs Online

Mark up documents with intelligent under-text highlights, geometric shapes, freehand pen drawings, text notes, and embedded graphics without altering the underlying content.

Professional Document Markup in the Browser

Reviewing contracts, grading student essays, or annotating technical diagrams usually requires clunky desktop software. PdfShilp gives you a versatile suite of non-destructive markup tools right in your browser, enabling fast visual feedback, corrections, and note-taking on any PDF file.

Legible Highlighting Positioned Behind Text Glyphs

Standard browser canvas highlighters often draw semi-opaque yellow rectangles over top of text, making fine fonts murky and hard to read. PdfShilp’s rendering engine positions highlight objects in the vector stack behind original text glyphs, guaranteeing that typography remains razor-sharp and easily readable.

How to Annotate and Mark Up a PDF

Step 1: Open your PDF document in PdfShilp.
Step 2: Select a tool from the floating toolbar: Highlighter, Pen, Line, Arrow, Rectangle, or Image Placer.
Step 3: Click and drag on the page to apply markup, choose custom stroke colors and widths, or drop annotations.
Step 4: Use undo/redo controls to refine your markup, then export your annotated PDF with full vector fidelity.

Adding Custom Images and Stamps

Need to add a company logo, stamp, or signature image? PdfShilp allows you to place PNG and JPEG images anywhere on the page with interactive scaling and rotation controls, baking them seamlessly into the document structure upon export.

Frequently Asked Questions

Can I change the color and opacity of my highlights?: Yes. You can select custom colors and line thicknesses to differentiate comments, revisions, and approval markings.
Can I remove or undo annotations before saving?: Yes. Every annotation action supports full multi-level undo and redo, allowing you to revise your work before exporting.
Does adding annotations alter the original document text?: No. Annotations exist as independent vector and image layers, leaving the underlying text and document geometry intact.
Can other PDF readers view my annotations after export?: Yes. All annotations adhere to standard PDF specification standards and display correctly in Adobe Acrobat, Apple Preview, and mobile PDF apps.