How to change font size in PDF text that's already there
To change font size in a PDF, open it in Publish Media Software (PublishMedia), click the text box and set a new size in the Text Style bar; the font and color are in the same bar. That works on text that opened as text boxes and on text recovered with Make it editable (paid). Changing text and exporting are paid, and opening the PDF is free.
Bigger, smaller or a different font, in any modern browser.
Text changes and export need a paid plan; opening and viewing the PDF cost nothing.
- Text box selected✓ Ready
- Font size14 pt
- Font✓ Ready
What you can change about the text in a PDF
Make text bigger
Raise the size so small print is easy to read.
Shrink text to fit
Lower the size so a long name fits its space.
Switch the font
Pick a different typeface from the Text Style bar.
Recolor the words
Give a heading or a price a new color.
Highlight a line
Put a highlight behind words that need attention.
Widen the text box
Drag the box larger so resized text doesn't wrap.
Changing something besides the size?
Font size is often one fix among several. These guides cover the jobs that come with it.
Can you change the font size of existing text in a PDF?
Yes, if your editor treats the words as text. In Publish Media Software (PublishMedia), select the text box and choose a new size in the Text Style bar (paid). Annotation tools such as Preview, Microsoft Edge's PDF viewer and Apple's Markup can't, because they only place new text on top of the page.
Three ways to get to the text you want to resize
Most people start with the PDF itself; a template or blank page helps when the old layout is too cramped.
Open the PDF with the small text
Drop it on the start screen; text from program-made PDFs comes in as text boxes where the layout allows.
PDFs up to 250 MB open, unless they are password-protected
Open your PDFRebuild it on a template
If the old layout has no room to grow, move the words onto a print-ready template.
Browse templatesRetype it at the right size
For a short notice, typing it fresh at the size you want can be quickest.
New blank pageEditor tools for resizing PDF text
Everything you need to change type size sits in the PublishMedia page editor.
Text Style bar
Select a text box, then set its size, font and color in one place.
Resizable text boxes
Drag a box's handles to give larger text room, or narrow it after shrinking.
Make it editable
On a paid plan, turns pages that opened as pictures into text boxes you can resize. It can be undone.
Import Report
Shows whether a font was swapped when the file opened, so you know before you match sizes.
Starting a new notice instead?
When a PDF's text is too cramped to enlarge, a fresh layout can be simpler.
Layouts with room to grow
Print-ready layouts with headings and body text you can set to any size; export a PDF on a paid plan.
Template types
How to change font size in a PDF in four steps
These steps work in Chrome, Edge, Firefox or Safari on a computer, Chromebook or iPad.
Bring in the PDF
Go to publishmediasoftware.com, sign up with no credit card, and drop in the PDF whose text you want to resize.
Click the text box
Click the words you want to resize. If the page opened as a picture, choose Make it editable first (paid).
Set the new size
In the Text Style bar, choose a larger or smaller size; change the font or color there too if needed.
Check the fit and export
Widen the box if the text now wraps, look over Print Preview, then export a print-ready PDF on a paid plan.
6 ways to change font size in a PDF
Only some tools resize text that is already on the page. Each card says which kind it is.
As of October 2026, changing the font size of text already in a PDF requires an editor that treats that text as editable: Publish Media Software (PublishMedia) does it from the Text Style bar in any modern browser on paid plans ($9.99 a month or $99 a year), paid Adobe Acrobat edits text in place, and LibreOffice Draw resizes text line by line at no cost. Microsoft Word and Google Docs convert the PDF first and often lose layout. Preview, Microsoft Edge's PDF viewer and Apple's Markup only size the new text they add on top.
Publish Media Software (PublishMedia)
Select a text box and set the size in the Text Style bar, in Chrome, Edge, Firefox or Safari on a computer, Chromebook or iPad. Works on recovered scan text. Costs $9.99 a month or $99 a year. Limit: rebuilt pages can need small fixes.
Adobe Acrobat
Paid Acrobat Standard or Pro edits text in place, so you can select existing words and change their size and font. Runs on Windows, Mac and the web. Limit: the no-cost Acrobat Reader can't resize existing text.
LibreOffice Draw
Costs nothing on Windows, Mac and Linux. Click into a line's text box and change the size in the sidebar or toolbar. Limit: each line is usually its own box, so a paragraph means resizing line by line.
Microsoft Word
Word 2013 and later for Windows converts the PDF into a document where any text resizes like normal, then File › Save As › PDF saves it back. Limit: Word is paid software, and columns, text boxes and pictures often shift.
Google Docs
Open the PDF from Google Drive with Open with › Google Docs, then change the size from the toolbar, at no cost. Limit: Docs converts the PDF rather than editing it, so columns, design and many pictures don't survive.
Preview, Edge and Markup
Preview on a Mac, Microsoft Edge's PDF viewer and Markup on iPhone or iPad let you size the new text you type, at no cost. Limit: they can't resize the words already on the page; you can only cover them.
What resizing PDF text costs
Opening a PDF and reading its text is free, and free-plan files are deleted after 7 days, following a reminder email. Changing text size, font and color, Make it editable and print-ready PDF export are included in All-Access at $99 a year (Recommended) or Monthly at $9.99, cancel anytime, along with every template and unlimited storage.
Free Starter
$0
Open and view unlimited Publisher, Word, Excel, PowerPoint, PDF, and picture files free — stored for 7 days, then deleted automatically. Editing and export are on the paid plans.
Start freeAll-Access
$99/yr
Everything unlocked — full editing, every template in the library, and unlimited storage.
Monthly
$9.99/mo
All the same features, billed monthly — cancel anytime.
Questions about changing PDF font size
Why can't I change the font size in Preview or Edge?+
Preview on a Mac and Microsoft Edge's PDF viewer are annotation tools: they add new text boxes, drawings and highlights on top of a page but don't open the words already there for editing. You can set the size of text you add with them, but the original text stays fixed, so resizing it needs an editor such as PublishMedia, Adobe Acrobat or LibreOffice Draw.
How do I keep the same font when I make text bigger?+
Change only the size in the Text Style bar and leave the font name alone; the text keeps whatever font it opened in. If the Import Report says the original font was swapped, pick the closest match from the font list so the resized words blend with the rest of the page.
Why does my text spill onto a new line after I make it bigger?+
Larger letters take more room, so the words wrap when they no longer fit the text box's width. Drag the box's side handle to widen it, shorten the wording, or step the size down by one point. Check the pieces nearby too, since a wider box can overlap a picture or another line.
Can I resize text in a scanned PDF?+
Yes, after OCR: a scanned page is a picture, so choose Make it editable (paid) to recover the words as text boxes, then set a new size in the Text Style bar. Proofread first, because OCR can misread faint or handwritten text, and fix any wrong letters before resizing.
Can I make the text bigger in a PDF just to read it?+
Yes, and that costs nothing: zoom in with a PDF viewer instead of changing the file. The built-in viewers in Chrome, Edge, Firefox and Safari all zoom, as does Preview on a Mac. Changing the size inside the file only matters when you want to print or share it with larger text.
Which plan do I need to resize PDF text in PublishMedia?+
Either paid plan: All-Access at $99 a year and Monthly at $9.99 both include the Text Style bar, Make it editable and print-ready PDF export. The free plan opens and shows the PDF, so you can see which text came in as text boxes before you pay.
Can I change the font size on my iPhone?+
Yes, in Safari: on a paid plan, run Make it editable, tap the text, then pick a new size from the formatting toolbar, which scrolls sideways on a narrow screen. Tiny captions are easier to hit on an iPad, Chromebook or computer, and iPhone Markup can only size new text you add, never the words already there.
What's the difference between font size and text box size?+
Font size sets how tall the letters are; text box size sets the area the words can fill. In PublishMedia you change font size in the Text Style bar and box size by dragging the box's handles. Raise the font without widening the box and the words wrap onto more lines.
Can I change the font size in a PDF form field?+
Not in PublishMedia, which doesn't fill or create interactive form fields. The text size of a field is set by whoever built the form, and paid Adobe Acrobat's form tools can change it. To fill in a form as it is, use Adobe Acrobat Reader, Preview on a Mac or Edge's PDF viewer.
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