YouTube Thumbnail Compressor
Compress YouTube thumbnails for Studio, mobile upload, or the Data API locally. No upload, no signup.
Compress YouTube thumbnail
Crop or fit one image to 16:9 and compress it for YouTube Studio, mobile upload, or the YouTube Data API.
Output JPG or PNG ยท Processed locally in this browser tab
Files are processed in your browser. No data is uploaded.
Questions
Does YouTube Thumbnail Compressor upload my image?
No. The thumbnail is processed locally in your browser tab and the file is never uploaded.
Why are there Studio, mobile, and API targets?
YouTube Studio desktop, mobile thumbnail upload, and the YouTube Data API publish different file-size limits, so the compressor checks the target you choose.
Can it force every thumbnail under 2 MB?
It retries lower JPG or WebP quality settings locally. Very detailed 4K thumbnails may still need the Standard HD preset or lower quality to fit under 2 MB.
Does Utilumo upload my input?
No. This tool is designed for local browser processing and does not send your input to a server.
Do I need an account?
No. Utilumo tools are built to work without accounts or sign-in.