Font Previewer
Load a font file and preview it with your own text, at any size, weight, letter spacing and line height.
Convert with this tool
or choose a file from your device — it is processed in this tab and never uploaded
Accepted: TTF, OTF, WOFF, WOFF2 (support varies by browser for WOFF2)
Files stay on your device. There is no upload, no queue and no watermark, so a conversion works even with the network switched off after the page has loaded.
Supported formats & processing
| Accepted input | TTF, OTF, WOFF, WOFF2 (support varies by browser for WOFF2) |
|---|---|
| Produced output | A live preview — no file is produced |
| Processing | Web Audio API + canvas + native JavaScript encoders |
| Upload required | No — the file is read locally and never transmitted |
How to use this tool
- Add the font fileIt is registered in the page as a usable font family.
- Type your own textYour product name, a headline, a paragraph — whatever you actually need to set.
- Adjust the size and weightVariable fonts respond to the weight control across their full range.
- Tune the letter spacing and line heightSmall adjustments here often make more difference than the choice of font.
- Check the metrics in the result cardThe family name, glyph count and units per em are reported.
About this tool
The fastest way to judge a typeface is to set your own words in it. Lorem ipsum tells you nothing about how a font handles your brand name, your product titles or a paragraph of real copy.
This previewer registers your font file with the browser's FontFace API, which means it becomes a real, usable font in the page — not a picture of one. Every control re-renders live, so you can compare letter spacing, line height and weight settings and see exactly how the type behaves before committing it to a project.
Features
- Real FontFace API registration, not an image of the font
- Live re-rendering on every control change
- Weight control from 300 to 900 for variable fonts
- Letter spacing and line height tuning with numeric readouts
- Uppercase, lowercase and capitalise transforms
- The font file is never uploaded anywhere
Frequently asked questions
Why does the preview look different from my design tool?
Font rasterisation differs between engines. Browsers use their own hinting and anti-aliasing, and subpixel rendering varies by platform. The glyph shapes are the same; the rendering is not.
Which format should I preview?
TTF and OTF are the most portable across browsers. WOFF loads well everywhere. WOFF2 support depends on the browser's decompression, which is universal in current versions.
Can I preview several fonts side by side?
Run the previewer once per font, or use the font pairing generator, which sets two typefaces together in the same view.
Does the preview work offline?
Yes. The font is read from your device with the File API and registered locally, so no network request is made.