Add Background to PDF — Coloured Page Backgrounds
Give every PDF page a solid colour background — useful for tinted prints, accessibility overlays and highlighted drafts.
Add Background to PDF gives every page a solid coloured background while preserving the visible content on top. It works by creating a new page of the same size, filling it with your chosen colour, and then embedding the original page on top using pdf-lib’s drawPage API.
All processing is 100% client-side. Your PDF is opened inside your browser tab, edited with pdf-lib (and rendered with pdf.js when needed), and saved as a Blob download. Nothing is ever uploaded to any server and closing the tab wipes every working buffer.
- Solid colour background applied to every page
- Preserves existing content on top (uses pdf-lib drawPage)
- Custom hex colour + opacity slider
- Optional edge margin so the tint does not reach the paper edge
- Runs entirely inside your browser
- 1Upload the PDF.
- 2Pick a colour and opacity.
- 3Optionally set an edge margin for a bordered look.
- 4Press Apply and download.
- Use very light tints (5–10% opacity) to avoid making text harder to read
- For a subtle brand hint, use your primary colour at 5% opacity
- For a full print bleed, set edge margin to 0
The tool creates a new PDF document. For each source page it embeds a copy via embedPage, creates a new page with matching dimensions, draws a colour rectangle covering the whole page (or leaving a small edge margin), and then draws the embedded page on top. This ordering guarantees the background sits behind your content — rather than covering it.
The colour is any hex value you pick from the built-in colour input. The opacity slider (5–100%) controls how strong the tint is. Very low opacity (5–10%) is ideal for accessibility tints. Higher opacity is useful for coding stages of a workflow (draft / review / final).
Because the background approach uses embedPage, the output file is slightly larger than the input — typically by a few kilobytes per page. This is normal and reflects the added colour rectangle + a shared reference to the original content stream. Downstream compression (via Compress PDF) will often recover most of the added size.
Your files never leave your browser. All parsing, page rendering and PDF assembly happens locally on your device using open-source libraries (pdf-lib and pdf.js). ilovedigital.in cannot see, store or share the contents of your documents.
Frequently asked questions
Common questions about the Add Background to PDF — Coloured Page Backgrounds tool and how your data is handled.
Does the tool convert my PDF to images?
Can I use an image background?
Are my files uploaded?
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