File Size Analyzer
Measure file or text payload size — locally in your browser.
Tool
Paste your input and get output instantly. Everything stays in your browser.
Drop a file here
or click to choose — stays 100% local
Bytes
0
KB
0
MB
0
Characters
0
UTF-8 bytes (text)
0
Status
Ready
✓ Runs locally
✓ No uploads
✓ No tracking
What the tool does
Displays file or text size in bytes, KB, and MB.
When to use it
Checking API limits, payload sizes, or upload constraints.
Quick example
Paste text or select a file and instantly see its size.
Security / privacy
Files are never uploaded. Size is calculated locally.