Font Size Converter
px, em, rem, pt, type scales and clamp(). Free
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Three typography tools in one. First, convert font sizes between px, em, rem, pt and % using any base size, with a live preview. Second, build a modular type scale with 8 ratios, from Minor Second to the Golden Ratio, and copy it as CSS variables. Third, make responsive fluid text with a clamp() builder: set min and max sizes and viewport widths, and get rem-based code that respects user zoom. It also has dark mode and history. 100% free, no signup.
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PH · launched Oct 31, 2026 · 2 upvotes (top 22%)
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
- Design Tools
- Productivity
- Developer Tools
Similar launches
See all 270 similar launches →Could you build this?
Yes This is a set of client-side unit conversions, modular scale calculations, and clamp() generators. These are simple math and UI tasks that a vibe-coded web app handles easily.
Competitors
Other products that read as similar to this one : 270 launches clear the similarity bar, closest 8 shown.
Attention rank: #30 of 271 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 365 days after the earliest competitor.
- px to rem and rem to px · ph · 2026-09-20 · 1 upvotes · similarity 0.59
- PX to EM and EM to PX · ph · 2026-09-13 · 2 upvotes · similarity 0.58
- Axisize · ph · 2026-10-06 · 9 upvotes · similarity 0.53
- FontMeter · ph · 2026-10-24 · 6 upvotes · similarity 0.49
- TypoSwap · ph · 2026-09-19 · 1 upvotes · similarity 0.46
- PdfRuler · ph · 2026-10-23 · 2 upvotes · similarity 0.45
- React hooks that predict text height before render, using font metrics · hn · 2026-04-04 · 8 upvotes · similarity 0.45
- Tattoo Font Generator · ph · 2026-10-27 · 1 upvotes · similarity 0.44