Sample OTF Files — Download Free OpenType Fonts for Testing
OpenType Font (CFF outlines) · .otf · MIME type font/otf
Download a sample OTF file with genuine OpenType/CFF outlines. This matters more than it sounds: many files distributed as “sample OTF” are TrueType fonts with the extension changed, which passes an extension check and fails a real parser. Each file here is rebuilt glyph by glyph into Type 2 charstrings and carries a CFF table with no glyf table at all, and we verify the sfnt version is OTTO before publishing.
Use them to test anything that distinguishes outline formats: PDF embedding, font conversion, layout engines, and validators that check structure rather than file names. Six faces are available, matching the TTF, WOFF and WOFF2 sets so you can compare identical typefaces across containers.
Download sample OTF files
| File | Details | Size | Download |
|---|---|---|---|
sample-font-roboto-mono-regular.otf | Roboto Mono Regular · SIL Open Font License 1.1 | 194 KB | |
sample-font-open-sans-regular.otf | Open Sans Regular · SIL Open Font License 1.1 | 195 KB | |
sample-font-lora-regular.otf | Lora Regular · SIL Open Font License 1.1 | 216 KB | |
sample-font-roboto-regular.otf | Roboto Regular · SIL Open Font License 1.1 | 231 KB | |
sample-font-roboto-bold.otf | Roboto Bold · SIL Open Font License 1.1 | 231 KB | |
sample-font-inter-regular.otf | Inter Regular · SIL Open Font License 1.1 | 521 KB |
Use these files from the command line or CI
Every URL is stable and CORS-open. Pin the SHA-256 in your test and you will know the moment a fixture changes.
# Download one file curl -O https://pnb-website-bucket.s3.us-east-2.amazonaws.com/samples/fonts/otf/sample-font-roboto-mono-regular.otf # Verify it (SHA-256 is listed for every file above) shasum -a 256 sample-font-roboto-mono-regular.otf # Machine-readable index of every sample file curl https://pnb-website-bucket.s3.us-east-2.amazonaws.com/samples/index.json | jq '.files[] | select(.format=="otf")'
OTF format at a glance
| Full name | OpenType Font (CFF outlines) |
|---|---|
| Extensions | .otf |
| MIME type | font/otf |
| Standard | OpenType (ISO/IEC 14496-22), CFF outlines |
| Outlines | Cubic Bézier (CFF / Type 2 charstrings) |
| Magic bytes | 4F 54 54 4F ("OTTO") |
| Licence | SIL Open Font License 1.1 |
| Verified | sfntVersion OTTO, CFF present, glyf absent |
What people test with sample OTF files
- Parsers that must distinguish CFF from glyf outlines
- PDF font embedding and subsetting
- Print and design-tool font handling
- Font conversion tooling (OTF to WOFF2)
- Upload validation that inspects structure, not extension
Frequently asked questions
Is this a real OTF or a renamed TTF?
A real one. Each face is rebuilt with fontTools' FontBuilder: every glyph is re-drawn through a Type 2 charstring pen into a CFF table, and the file is written with the OTTO sfnt version. Before publishing we reopen each file and assert that CFF is present and glyf is absent. You can confirm the same with fontTools or by checking the first four bytes read OTTO.
Should I use OTF or WOFF2 on a website?
WOFF2, always. OTF is a desktop and print format; serving it to a browser means sending an uncompressed font when a WOFF2 of the same face is roughly a quarter of the size. Keep OTF for design tools, PDF embedding and server-side rendering.
Can I use these fonts in a commercial project?
Yes. Every face is released under the SIL Open Font License 1.1, which permits use, modification, embedding and redistribution, commercially included. You may not sell the fonts on their own, and a modified version must not keep the original reserved font name. The full licence text is published alongside the files.
Are these variable fonts?
No. The upstream sources are variable, and we instance each to a single static weight before conversion, then delete the leftover fvar, avar, STAT and gvar tables. Static faces are what font loaders, subsetters and validators are normally tested against, and an orphaned variation table is a common source of confusing failures.
Do the files contain the full character set?
Yes, the full upstream character set — between 778 and 2,849 mapped codepoints depending on the family, covering Latin, Latin Extended, Greek and Cyrillic. Nothing is subset, so these are also useful for testing that your own subsetting pipeline actually reduces the file.
Are these OTF files safe to download?
Yes. Every file is generated by our own open script from scratch — nothing is scraped or user-uploaded — and contains no scripts, macros or executables. The SHA-256 of each file is published on this page so you can verify what you received.
Can I use the sample OTF files commercially?
Yes. They are free for any purpose, including commercial products, test suites, demos and redistribution, with no attribution required. There is nothing to license and no one to ask.
Can I hotlink these files or use them in CI?
Yes. Every link is a stable direct URL over HTTPS with Access-Control-Allow-Origin: * and long cache headers, so curl, wget, fetch() and test runners can pull them directly. A JSON index of every file is linked from each page (see the command-line section).
Related sample files
Free tools that work with OTF
- Favicon Generator — Turn any logo into a complete favicon package — favicon.ico, all PNG sizes, Apple touch icon, and webmanifest — in one click.
- Test File Generator — Generate a dummy file of any exact size in your browser — 1 KB to 2 GB, random bytes, text, CSV or JSON.
Found a problem, or something that could be better? We read every message and we fix things quickly.
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Uploads, conversions, previews, document processing and media workflows are the kind of production systems Pine & Birch designs and runs for clients — which is why we needed these files in the first place.
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