ADA §703.5 Font Compliance Analyzer — Digital Signage

Curated Google Fonts evaluated against the 2010 ADA Standards for Accessible Design, Chapter 7 (Signs). Test any Google Font by name or upload a TTF/OTF file for direct metric analysis.

25 fonts
Selected for download

Click fonts to select them

To embed in Odoo Knowledge: host this file and paste its URL into a page block using / → HTML Block or an <iframe> in the article source.
ADA §703.5 criteria
Sans-serif, conventional form (§703.5.3)
O:I width ratio 55–110% (§703.5.4)
Stroke weight 10–30% of height (§703.5.7)
Character spacing 10–35% (§703.5.8)
No italic/script/decorative (§703.5.3)

= passes with weight restrictions

Test any Google Font for ADA §703.5 compliance

Enter a Google Font name exactly as it appears on fonts.google.com. The tool renders test characters on a canvas and measures key geometric ratios against ADA signage standards.

How scoring works (Google Fonts)
Canvas pixel measurement
Renders I and O to a hidden canvas at 120px, scans bounding boxes for §703.5.4 O:I ratio and §703.5.7 stroke weight. Accuracy ~±5%.
Style & form
Font name heuristics detect serif, script, and decorative patterns for §703.5.3 compliance.
Upload a TTF instead
For higher-accuracy metric analysis using the actual font binary tables, use the Upload TTF / OTF file tab.
Quick-test suggestions
⇧
Drop a TTF, OTF, WOFF or WOFF2 file here
Or click to browse your files

Files are processed entirely in your browser — nothing is uploaded to any server. Analysis reads font metric tables directly from the binary file for the most accurate ADA §703.5 measurements available.

–
Live character preview
IO Hamburgefons
The quick brown fox jumps over the lazy dog
I O H B D 1 l 0 8 Q W M
Light-on-dark contrast test
IO Hamburgefons
–
–
–

Raw font metrics from binary tables
MetricValueSource

How TTF analysis works
Direct table parsing
Reads binary font tables using a JavaScript DataView — no server, no library. Measurements from the font's own metric data.
Tables read:
  • head — unitsPerEm
  • OS/2 — sCapHeight, usWeightClass, fsSelection, panose
  • hhea — ascender, lineGap
  • hmtx — advance widths for O and I
  • cmap — glyph index for O and I
  • name — family name, subfamily
Accuracy
O:I from hmtx is exact. Stroke from usWeightClass is a strong estimate; canvas provides cross-check. Combined: ±2–3% vs ±5% canvas-only.
Privacy
Font file never leaves your browser. All parsing runs locally in JavaScript.
ADA §703.5 — what we measure
§703.5.3 Style — Sans-serif, no italic/script/decorative. Via OS/2 fsSelection, panose bFamilyType, name table.
§703.5.4 O:I proportion — O width 55–110% of I height. From hmtx advance widths / sCapHeight.
§703.5.7 Stroke weight — I stroke 10–30% of height. From usWeightClass + canvas cross-check.
§703.5.8 Spacing — 10–35% of height. Condensed-variant name detection.
§703.5.3 Conventional form — No unusual letterforms. Via panose + subfamily name.