QR code renderer in a TrueType font
Details
- External ID
- 48703200
- Source
- HN
- Company
- —
- Product
- QR code renderer in a TrueType font
- Website domain
- jim.sh
- Launched
- June 28, 2026
- Cohort
- —
- Upvotes
- 118
- Upvotes percentile
- 0.9296448087431693
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
In the "Libre Barcode Project" discussion yesterday, 1bpp asked: "Is anyone willing to sacrifice their sanity for the sake of implementing a QR renderer as TTF hinting code?"Yes. I had some tokens to burn and was curious... turns out, it's possible. This was put together by a mix of Gemini, GPT, and Claude (depending on which usage limits kept running out).
Enrichment
- Theme
- QR code generation and utilities
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- qr code font renderer
- Manually corrected
- False
Could you build this?
No Implementing a full QR code generation engine inside a TrueType font's hinting bytecode (assembly executed by the rasterizer) is an extreme, highly specialized low-level bytecode hack.
What it would actually take: This requires programming directly in TrueType bytecode instructions (TTF hinting language) to perform bit manipulation, Reed-Solomon error correction, and pixel positioning during font rasterization. Tools involve specialized TrueType table editors (FontTools/ttx) and intimate knowledge of font engine virtual machines (FreeType, Windows DirectWrite). This is an esoteric systems feat requiring rare expertise in vector font VMs and specification-level typography bytecode.
Discussion
18 comments analyzed.
Competitors mentioned: JavaScript QR code renderers, Browser/OS screenshot scanning interfaces
Concerns raised: Security risk from Turing-complete font rendering (remote execution vulnerabilities), File size much larger than JavaScript alternatives, Font rendering complexity creates CVE surface (legacy of Type 1 fonts), Kernel-level font rendering vulnerabilities on Windows
Feature requests: Use reserved characters instead of brackets for QR encoding, Different control sequences to specify QR code sizes, Make QR codes on web pages clickable with URL scheme support, Browser/OS native on-screen QR code scanning interface
Competitors
Other products that read as similar to this one — 73 launches clear the similarity bar, closest 8 shown.
Attention rank: #2 of 74 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 233 days after the earliest competitor.
- TTF-DOOM · hn · 2026-04-06 · 68 upvotes · similarity 0.56
- A font that auto-translates Chinese · hn · 2026-04-19 · 5 upvotes · similarity 0.43
- RahaLune QR Studio · ph · 2026-09-25 · 1 upvotes · similarity 0.43
- Scanou · ph · 2026-09-22 · 1 upvotes · similarity 0.41
- QRForge - Link/Text To QR Code · ph · 2026-09-28 · 1 upvotes · similarity 0.40
- Unicode cursive font generator that checks cross-platform compatibility · hn · 2026-01-01 · 11 upvotes · similarity 0.39
- GetQRFlow · ph · 2026-09-14 · 1 upvotes · similarity 0.39
- QR Forge · ph · 2026-09-22 · 1 upvotes · similarity 0.38
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a dev tools tool for Sales yet.