Encoding mode
Numeric (digits only) is most compact, then alphanumeric, then byte for everything else including lowercase and symbols.
Analyzer · Free · Private
QR code analyzer
Curious what's really inside a QR code? Paste the content and see its encoding mode, size, best-fit version and how much capacity you're using at each error-correction level.
Content to analyze
Paste the exact data a QR code encodes. Paste a decoded
result from the Decoder to inspect a real code.
Higher levels recover from more damage but need a larger
code for the same data.
All analysis happens locally —
nothing is uploaded.
Breakdown
Type or paste some content to see its full breakdown.
Reading the numbers
What each part means
A quick guide to the values in the breakdown.
Version
QR codes come in 40 versions. Higher versions hold more data using a bigger grid of modules — from 21×21 up to 177×177.
Grid size
The number of modules (squares) per side. More modules means each one is smaller when printed at a fixed physical size.
Error correction
Redundant data that lets a code still scan when scuffed or partly covered — from ~7% (L) up to ~30% (H).
Capacity used
How full the best-fit version is. Near 100% means any extra character bumps you to a larger, denser code.
Content type
What the data represents — a link, WiFi, contact and so on — which determines what happens when it's scanned.
Ready to check it scans?
Run your content through the validator for a quick pass/fail before printing.
Open the validator