How to use PDF Font Checker
- Choose one PDF within browser safety limits.
- Review every measured fact and unknown limitation.
- Use a linked existing tool only when a supported finding needs action.
PDF Font Checker
Identify fonts used by searchable PDF text, subset names, page usage, and supported embedding evidence without uploading the file.
The PDF and diagnostic facts stay in browser memory. The source is not modified, uploaded, or saved, and embedded actions are never executed.
Add a PDF sourceOne PDF · 100 MB and 300 page safety limitsChoose from your device or drag and drop a file here.
Identify fonts used by searchable PDF text, subset names, page usage, and supported embedding evidence without uploading the file. Results are evidence-based, and any fact the current parser cannot establish remains labeled unknown.
How OpenFileTools processes it
Local processing, explicit choices.
The managed PDF.js session reads searchable-text fonts, page geometry, and image-paint operators in memory. Reused raster placements are measured independently at their displayed size. Embedded actions are never executed.
Quick technical summary
What this tool changes.
| Property | Behavior |
|---|---|
| Processing | Browser local; PDF is not uploaded to OpenFileTools |
| Detects | Font names, subset naming, page usage, and supported embedding evidence |
| Scanned/outlined text | May not expose font resources that can be identified |
| Compliance | No automatic printer, licensing, PDF/X, or accessibility approval claim |
Identify fonts used by searchable PDF text
PDF Font Checker inspects font resources associated with searchable text and summarizes normalized font names, subset prefixes, page usage, and the embedding evidence the browser parser can actually expose. It does not guess a font name from the visual appearance of scanned or outlined text.
- Subset names such as ABCDEF+MyFont are normalized for review while the original evidence remains visible.
- Page usage is reported so a font can be traced to the pages where it appears.
- Image-only scans and text converted to outlines may not expose usable font information.
Treat embedding as evidence, not a blanket compliance verdict
A PDF can reference fonts in several ways, and parser-visible evidence is not always enough to prove every production detail. The checker labels supported embedding evidence and keeps uncertain cases explicit instead of turning unknown into a pass.
- Embedded or subset evidence helps explain portability, but it does not guarantee a printer or workflow will accept the file.
- A font name alone does not prove licensing rights or visual fidelity on every renderer.
- For print delivery, combine font inspection with page-size, image-resolution, color, bleed, and destination-specific checks.
Use the result to investigate a real problem
If a recipient reports substituted text, missing glyphs, or a print-preflight warning, compare the affected page, font name, and embedding evidence first. Preserve the original PDF and fix the source document when possible rather than repeatedly rewriting the final PDF without understanding the cause.
Questions, answered.
Can this tell me which fonts are used in my PDF?
It can report fonts referenced by searchable PDF text when the parser exposes those resources. Scanned pages and text converted to outlines may not identify cleanly.
What does a subset font name mean?
A prefix such as ABCDEF+ often indicates a subset of the font was embedded. The checker normalizes that prefix for easier review while preserving the underlying evidence.
Does 'embedded' guarantee my printer will accept the PDF?
No. Font embedding is one preflight factor. The destination can also require particular PDF standards, page geometry, color handling, image resolution, bleed, or other conditions.
Does this check font licensing?
No. It inspects technical PDF evidence and does not determine whether you hold the rights required to use or distribute a font.