JetBrains Mono vs Fira Code
The JetBrains Mono vs Fira Code matchup is one of the most common decisions developers face when picking a coding font. Both are free, both add programming ligatures, and both prioritize legibility, so the choice usually comes down to x-height, character shapes, and which ligature style you prefer.
What is JetBrains Mono?
JetBrains Mono was created by JetBrains and released in 2020 as the default typeface for its family of IDEs, including IntelliJ IDEA, PyCharm, and WebStorm. It is a monospace font engineered specifically for reading code: it has a notably tall x-height, increased letter height, and carefully balanced spacing to reduce eye movement across long lines. It includes programming ligatures that combine multi-character operators (such as != or =>) into single glyphs, and it disambiguates similar characters like 0/O and 1/l/I. It is free under the SIL OFL / Apache license.
What is Fira Code?
Fira Code is an extension of Fira Mono, the monospace member of Mozilla’s Fira typeface family designed by Carrois. Nikita Prokopov added an extensive set of programming ligatures on top of Fira Mono, and the result became one of the most popular coding fonts in the world. Fira Code retains Fira Mono’s clean, humanist-influenced letterforms while rendering common operator sequences as ligatures, improving the visual flow of code. It is free under the SIL Open Font License. Both faces feature in our overview of the best Google Fonts for developers.
What’s the difference between JetBrains Mono and Fira Code?
Both are free, ligature-enabled monospace fonts, but they differ in x-height, letterform style, and ligature heritage.
| Property | JetBrains Mono | Fira Code |
|---|---|---|
| Classification | Monospace coding font | Monospace coding font |
| Designer / year | JetBrains, 2020 | Fira Mono (Carrois) + ligatures by Nikita Prokopov |
| Key trait | Tall x-height, IDE-tuned, ligatures | Established large ligature set, humanist forms |
| Best used for | IDEs, long coding sessions | Editors, terminals, wide tooling support |
| Availability / license | Free, SIL OFL / Apache | Free, SIL OFL |
When should you use each?
Use JetBrains Mono if you work in JetBrains IDEs or want the tallest, most upright glyphs for scanning dense code, since its increased x-height keeps characters distinct during long sessions. Use Fira Code if you want a battle-tested font with the broadest tooling support and a slightly softer, more humanist texture, or if you already prefer the Fira aesthetic. Both render ligatures only in editors that support them, so confirm your editor enables font ligatures before relying on the feature.
Which is better for coding?
Neither is objectively better for coding; both are top-tier choices, and the winner depends on your eyes and editor. JetBrains Mono’s taller x-height can make code feel larger and more legible at the same point size, which many developers find less fatiguing. Fira Code’s longer track record means more documented configurations and a familiar ligature style. A practical approach is to try each for a week in your editor and judge readability of 0/O, 1/l/I, and bracket-heavy code. For broader sibling comparisons, see our Source Code Pro vs Fira Code and Roboto Mono vs JetBrains Mono guides.
Are JetBrains Mono and Fira Code free?
Yes. JetBrains Mono is free under the SIL Open Font License (with Apache terms historically referenced), and Fira Code is free under the SIL OFL. Both can be used in personal and commercial projects, embedded, and self-hosted at no cost. For a clear explanation of what open font licenses permit, consult our font licensing guide.
Frequently Asked Questions
Do both fonts have programming ligatures?
Yes. Both JetBrains Mono and Fira Code include programming ligatures that render operator sequences such as ==, =>, and != as combined glyphs. Fira Code pioneered the widely copied ligature set, while JetBrains Mono offers a comparable set tuned for its IDEs. Ligatures only appear in editors configured to support them.
Which font handles 0/O and 1/l/I better?
Both fonts are explicitly designed to disambiguate confusable characters. JetBrains Mono and Fira Code both give the zero a distinct shape from the capital O, and clearly differentiate the digit 1, lowercase l, and capital I. In practice the difference is subtle, so preference often comes down to overall letterform style rather than one being clearly safer.
Can I turn ligatures off?
Yes. Both fonts work fine as plain monospace faces with ligatures disabled, and most editors let you toggle the feature. Some developers disable ligatures because combined glyphs can obscure the exact characters in the source. With ligatures off, you still get the precise spacing and clear letterforms of each font.
Which has a taller x-height?
JetBrains Mono has the taller x-height of the two. Its designers raised the lowercase letters and overall character height specifically to make code easier to read in IDEs at smaller sizes. Fira Code’s x-height is slightly more conservative, giving it a marginally airier, more humanist appearance in dense code.
Are these the only good coding fonts?
No. JetBrains Mono and Fira Code are among the most popular, but strong alternatives include Source Code Pro, Roboto Mono, and Consolas, each with different trade-offs around ligatures and letterform style. Our guides comparing these faces, including Consolas vs Courier, can help you choose the right monospace for your workflow.
