Replace Fonts in Published PDFs. Layout Stays Intact.
The only tool that handles mixed fonts, complex tables, and footnotes in production-quality PDFs. Batch-process hundreds of titles via API.
Try FontSwap Free →The Problem
The Hard Part Isn't Editing — It's Preserving the Layout
Replacing fonts in a finished PDF sounds simple. But in production-quality books with mixed fonts, tables, and footnotes, every change ripples through the layout. That's the problem PDFDancer was built to solve.
The Challenge
- Mixed-font lines (body text + inline code) need fragment-level precision — changing the whole line breaks formatting
- Bold, italic, superscript styles are tied to the original font and easily lost during replacement
- Character spacing and justification shift when font metrics change
- Complex structures — tables, footnotes, FormXObjects — are fragile and break with most editing approaches
- Doing this manually in the source files takes days per book. At scale, it's not viable
How PDFDancer Handles It
- Replaces fonts at the text-fragment level — mixed-font lines stay correct
- Preserves bold, italic, superscript, and all inline styles automatically
- Maintains character spacing, line spacing, and justification
- Handles tables, footnotes, indexes, and FormXObjects
- API-driven: batch-process your entire backlist in hours, not months
Validated in Production
Tested Where Others Failed
A German technical publisher evaluated every tool on the market for their backlist migration. This is what they found.
We tested everything we could find. Nothing preserved the layout in our books — until we tried PDFDancer. The result was almost perfect on the first run.— IT Director at a German technical publisher, evaluating tools for a 200-title backlist migration
See It in Action
Font Replacement in 12 Lines of Code
No GUI. No manual clicking through 200 books. A clean API that your dev team can integrate into any workflow.
Want to see it work before writing any code? Try FontSwap — upload a PDF and replace a font in seconds.
Use Cases
Why Publishers Need This
Finished PDFs aren't a dead end anymore.
Font License Migration
Switch to open-source fonts across your entire E-Book catalog — and own your typography going forward.
Post-Merger Rebranding
Two imprints, one brand. Unify fonts and styles across hundreds of backlist titles — without reopening a single InDesign file.
Batch Error Correction
Wrong font in 50 published titles? Fix it programmatically in an afternoon. Your prepress team focuses on new titles, not legacy cleanup.
Backlist Modernization
Update typography across legacy titles for new platforms and markets. No source files needed.
Automated Workflows
Integrate font replacement into your existing production pipeline. API-first, batch-capable, scriptable.
Platform Requirements
E-Book platforms demanding specific font formats or families? Convert your catalog without manual rework.
How It Works
From Evaluation to Production in Weeks
Evaluate
Send us a few representative PDFs. We run them through PDFDancer and show you the results — with your actual books, not generic samples. Two weeks, no commitment. Or try it yourself right now — FontSwap lets you test font replacement on your own PDFs, instantly.
Customize
If your books need special handling — unusual font combinations, specific layout rules, edge cases — we adapt PDFDancer to your requirements. You get a dedicated instance.
Process
Your backlist runs through PDFDancer. Batch processing via API, monitored by us, with support throughout. Self-hosting or managed — your choice.
Get Started
Your Backlist Doesn't Have to Wait
Tell us about your project. We'll run your PDFs through PDFDancer and show you results within a week — no cost, no strings.