Calculator
What the Add Image to PDF does
Add Image to PDF: places a PNG or JPG (a signature, stamp or logo) on the pages you choose at one of nine positions, scaled to a percentage of the page width with adjustable opacity. Everything runs in your browser and the file is never uploaded.
The Add Image to PDF converts the file you choose without uploading it anywhere. The work happens inside your browser tab, so there is no upload to wait for and no queue.
Typical users are someone splitting a long report. Most PDF chores are simple, yet the usual tools want an account and an upload first.
Nothing leaves the tab. You can watch your browser network panel while you use it and see for yourself.
The method, a field-by-field reference and a worked example built from the defaults are all on this page.
What do the Add Image to PDF fields mean?
The Add Image to PDF uses 7 inputs. Each input has a default that makes sense on its own, so a partial edit still gives a valid result.
| Field | What to enter | Default |
|---|---|---|
| PDF File | stays on your device | none |
| Image to place (PNG or JPG) | stays on your device | none |
| Position | choose from Bottom right, Bottom centre, Bottom left, Centre of page, Middle left or Middle right | Bottom right |
| Image width | measured in % of page width; accepts 1 to 100 | 25 |
| Margin from edge | measured in mm; accepts 0 to 100 | 10 |
| Opacity | measured in %; accepts 5 to 100 | 100 |
| Pages (all, or e.g. 1 for the first page only) | required | all |
How does the Add Image to PDF work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same conversion.
Nothing is computed until the inputs pass their checks, so you will not get a confident answer built on a typo.
What a typical run looks like
You provide: PDF File, Image to place (PNG or JPG), Position, Image width, Margin from edge, Opacity and Pages (all, or e.g. 1 for the first page only)
What happens: the file is read into memory by your browser, processed locally, and offered back as a download. It is never uploaded.
You get back: a download link for the new file and a short note on what changed.
Timing comes down to your own hardware, and the practical size limit is how much memory the browser will hand the tab.
How to use it
- Choose your file under PDF File, or drag it onto the drop area.
- Choose your file under Image to place (PNG or JPG), or drag it onto the drop area.
- Pick a value for Position: the options are Bottom right, Bottom centre, Bottom left, Centre of page, Middle left or Middle right.
- Set Image width in % of page width (1 to 100).
- Put Margin from edge in mm (0 to 100).
- Key in Opacity in % (5 to 100).
- Fill in Pages (all, or e.g. 1 for the first page only).
- Press Place Image.
- The panel reports Status, Pages stamped and Image size.
- Copy Link is the quickest way to send the exact scenario to someone else.
What this tool does not do
- Very large documents are limited by your device memory, not by a server quota.
- Encrypted or password-protected files must be unlocked before they can be processed.
- The output is a number, not a judgement. Deciding what it means is still your job.
- Confirm the units before you act on the output. The arithmetic is only as sound as what went in.
- Large files are limited by your available memory, not by an upload quota.
Frequently asked questions
Enter Image width in % of page width, Margin from edge in mm and Opacity in %. The unit is shown beside each box, and the result carries its own label, so there is nothing to convert by hand.
Image width accepts 1 to 100 % of page width. If a value falls outside, the tool says which field is at fault instead of guessing.
Your file stays on your machine. Nothing is transmitted, stored or queued for processing elsewhere.
Nothing at all. There is no registration, no paywall and no per-use quota.
The output is deterministic. The same inputs always give the same answer, and the method is documented above so you can check it.