Font family
IBM Plex Serif font
IBM Plex Serif is a transitional serif designed to pair with IBM Plex Sans. It brings a calm, professional voice to long-form documentation.
The quick brown fox jumps over the lazy dog 0123456789
Uppercase
Lowercase
Digits
Punctuation
Click any glyph to copy it to your clipboard.
- 100Hamburgevons
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- 400Hamburgevons
- 500Hamburgevons
- 600Hamburgevons
- 700Hamburgevons
Font Details
- Designer
- IBM
- Foundry
- IBM
- Source
- Google Fonts
- License
- OFL-1.1
- Category
- serif
- X-height
- medium
- Styles
- normal, italic
- Subsets
- latin, latin-ext, cyrillic, vietnamese
- Weights
- 100, 200, 300, 400, 500, 600, 700
- Variable
- No
- Popularity
- 75/100
- Tags
- transitional, serif, body, corporate
Character and Use Cases
IBM Plex Serif , IBM Plex Serif is the text-flavored member of the IBM Plex superfamily, with the same engineered skeleton as its sans sibling but drawn with serifs and a warmer, more human rhythm. It balances corporate precision with enough warmth for long-form editorial.
The family is built for documentation, corporate editorial, reports, and any content that wants a professional voice without a bookish flourish. Seven weights plus true italics handle both headings and body text, and its proportions align with Plex Sans and Plex Mono, so a mixed-family product stays coherent.
400 for body text and long-form reading; 500 to 600 for subheadings and emphasized terms; 700 for section titles. The light weights at 100 to 300 read best at display sizes.
Production Code
Copy-paste into your project. No build step required.
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=IBM%20Plex%20Serif:wght@100;200;300;400;500;600;700&display=swap" rel="stylesheet">Pairings using IBM Plex Serif
View allThe art of typography
Good typography is the visible voice of design, quiet when it should be, loud when it must.
PreviewIBM Plex Sans + IBM Plex Serif
IBM Plex Sans headings over IBM Plex Serif body. A unified corporate family where sans and serif were drawn to sit on the same grid.
Frequently Asked Questions
- Is IBM Plex Serif suitable for body copy on screen?
- Yes, its moderate stroke contrast keeps hairlines controlled at 16 to 18px, which is what makes it steadier on screens than many classical print serifs.
- Can I mix Plex Serif with Plex Sans on one page?
- The two share the superfamily's proportions and feel, so headings in Plex Serif over Plex Sans body copy is a supported, coherent combination.
Test IBM Plex Serif in the playground
Drop IBM Plex Serif into the typography playground, mix it with another family, and check contrast on real text.