Change the font size in a PDF
Change the font size of existing text in a PDF, free and in your browser. Select a line and step the size up or down: single lines resize in place, and whole paragraphs re-wrap at the new size with the original font kept. Your file never leaves your device. No watermark, no sign-up.
- Runs in your browser: files are never uploaded
- No watermark, no sign-up
- Free to edit; downloading starts at 99p for your first week
Drag & drop your PDF here
Private: processed in your browser
What you can do with Change PDF Font Size
- Select existing text and step the size up or down, without retyping it
- The original embedded typeface, colour and weight are kept at the new size
- Whole paragraphs re-wrap at the new size instead of overlapping the line below
- A single line that must stay put shrinks to fit its space rather than wrapping
- Resize text you have added yourself as well as the text already in the document
- Runs on your device, so nothing is uploaded and there is no watermark
How it works
- 1
Open your PDF
Drop the file into the editor. It loads on your device and is never uploaded.
- 2
Select the text and pick a size
Click the line you want to change and step the font size up or down. The paragraph re-wraps around it.
- 3
Download your PDF
Export the file, or share it as a link and QR code.
Change PDF Font Size FAQ
Can I change the font size of text already in a PDF?
Yes. Click the line, pick a new size, and peadf redraws it in the document’s own font at that size. It is a real change to the text, not a text box pasted over the original.
Will bigger text overlap the line underneath?
No. The paragraph re-wraps at the new size, so lines reflow down the page rather than colliding. If an edit runs long, it flows onto a new page instead of falling off the bottom.
Does the font change when I resize?
No. peadf reuses the typeface embedded in your PDF, so resized text still matches the rest of the document.