Frequently Asked Questions
Everything you need to know about changing PDF fonts and text sizes online.
Our tool embeds the selected typeface into the document and maps all text layout references inside the page resources to the new font. This replaces the typeface instantly across all pages without layout shifts or text block overlays.
Yes! By using the global font size multiplier slider, you can scale all text sizes proportionally (e.g. 1.2x to increase size by 20%). The server decompresses the page content streams and modifies the font size operators directly.
Absolutely. Switching serif or complex fonts to a clean, highly legible sans-serif font like Helvetica/Arial is a key WCAG accessibility recommendation. You can convert any PDF to sans-serif instantly in one click.
Original vector diagrams, images, and layout blocks are fully preserved. However, since the internal bytes of the document are modified, any existing cryptographic digital signatures will be invalidated. We recommend altering fonts before applying signatures.
Yes. Your files are processed entirely in-memory on our secure servers and streamed directly back to your browser. No files are saved, indexed, or stored.