# Fonts Like Frank Ruhl Libre

12 open fonts whose letters are closest to Frank Ruhl Libre, ranked by a glyph comparison. All free for commercial use.

## Quick Answer

The closest open font to Frank Ruhl Libre is Charis SIL (similarity 81), then Noto Serif JP and STIX Two Text. Charis SIL is released under the SIL Open Font License 1.1 and is free for commercial use.

## Ranked Open Lookalikes (12 Fonts)

| Rank | Font | Similarity Score | Licence | Details |
| :--- | :--- | :--- | :--- | :--- |
| #1 | **Charis SIL** | 81 / 100 | OFL-1.1 | [/fonts/charis-sil/](/fonts/charis-sil.md) |
| #2 | **Noto Serif JP** | 79 / 100 | OFL-1.1 | [/fonts/noto-serif-jp/](/fonts/noto-serif-jp.md) |
| #3 | **STIX Two Text** | 79 / 100 | OFL-1.1 | [/fonts/stix-two-text/](/fonts/stix-two-text.md) |
| #4 | **IBM Plex Serif** | 77 / 100 | OFL-1.1 | [/fonts/ibm-plex-serif/](/fonts/ibm-plex-serif.md) |
| #5 | **Noto Serif Hentaigana** | 76 / 100 | OFL-1.1 | [/fonts/noto-serif-hentaigana/](/fonts/noto-serif-hentaigana.md) |
| #6 | **Amethysta** | 76 / 100 | OFL-1.1 | [/fonts/amethysta/](/fonts/amethysta.md) |
| #7 | **PT Serif** | 76 / 100 | OFL-1.1 | [/fonts/pt-serif/](/fonts/pt-serif.md) |
| #8 | **Libre Caslon Text** | 76 / 100 | OFL-1.1 | [/fonts/libre-caslon-text/](/fonts/libre-caslon-text.md) |
| #9 | **Noto Serif** | 76 / 100 | OFL-1.1 | [/fonts/noto-serif/](/fonts/noto-serif.md) |
| #10 | **Source Serif 4** | 75 / 100 | OFL-1.1 | [/fonts/source-serif-4/](/fonts/source-serif-4.md) |
| #11 | **Brygada 1918** | 75 / 100 | OFL-1.1 | [/fonts/brygada-1918/](/fonts/brygada-1918.md) |
| #12 | **Lora** | 74 / 100 | OFL-1.1 | [/fonts/lora/](/fonts/lora.md) |

## Other Scripts With Similar Latin Letters

- **Bpmf Zihi Kai Std** (Hant): Similarity 78, licence OFL-1.1 - [/fonts/bpmf-zihi-kai-std/](/fonts/bpmf-zihi-kai-std.md)
- **Annapurna SIL** (Deva): Similarity 77, licence OFL-1.1 - [/fonts/annapurna-sil/](/fonts/annapurna-sil.md)
- **Abyssinica SIL** (Ethi): Similarity 77, licence OFL-1.1 - [/fonts/abyssinica-sil/](/fonts/abyssinica-sil.md)

## Scoring Method

62 letters and digits (A-Z a-z 0-9) rendered at 160px cap height on a 32x32 grid with 3px gaussian blur, combined with edge-orientation texture (15% weight). Scores are normalized so that 0 represents an average pair of fonts across the 1571 compared fonts, and 100 represents identical letter shapes. Computed on 2026-10-22 using glyph-shape + edge-texture v2.

## Machine API

JSON representation available at [/api/fonts-like/frank-ruhl-libre.json](/api/fonts-like/frank-ruhl-libre.json).