YouTube Thumbnail Compressor
Reduce a thumbnail’s file size with adjustable quality while keeping its original dimensions. No upload is required.
Compress your thumbnail
Drop an image here
JPG, PNG, or WEBP · maximum 10 MB
PNG sources are accepted, but photographic PNG files can become large. JPG and WEBP use adjustable lossy compression and often reduce thumbnail file size more effectively.
Compress without hiding the idea
Compression removes image data to create a smaller file. Lower settings can introduce artifacts around text, faces, and high-contrast edges, so inspect the preview at the size viewers will see.
The “Optimize for YouTube” preset selects a practical JPG starting point, not a guaranteed file size. Adjust quality based on the specific artwork.
Preview and compare the final export
About image compression
Can the compressor guarantee an exact file size?
No. The result depends on image detail, dimensions, output format, and quality. Use the live size estimate to choose a suitable result.
Should I use JPG or WEBP?
JPG is widely compatible and effective for photographic artwork. WEBP can produce a smaller file at comparable visual quality in modern workflows.
Is my thumbnail uploaded?
No. The file is decoded and compressed locally with browser Canvas APIs and is not sent to TubeThumbnail.