Chrome 146 preserves MIME type parameters (e.g. charset=utf-8, version=1.4) when encoding files as data: URLs. Previously, parameters could be dropped or normalized during encoding. Drop a file below or use a preset to explore the difference.
Upload a File
File name:
File type:
File size:
Data URL prefix:
MIME Parameters Extracted
Parameter
Value
Preserved in v146?
Before vs After Chrome 146
Chrome 146+
pre-v146 (parameters stripped)
Charset Corruption Check
Text bytes with non-ASCII characters need the charset parameter. The stripped URL shows the UTF-8 fallback; the preserved URL decodes the same bytes with the declared charset.
Preset Examples
These simulate files with structured MIME types including parameters that were previously not preserved.
Test Rendering
The data URL embedded in different contexts. MIME parameters affect how browsers interpret and render the resource.