IMAGE TOOL · ONLINE
Thumbnail Maker Online
Resize and crop an image into a custom thumbnail canvas.
Create a custom-width thumbnail with cover-style cropping and JPEG or PNG output. Work on the preview first; use numeric controls only when you need exact placement or sizing.
Start from a larger source than the final thumbnail.
Ready — choose your input and options.
The website loads online. For supported file and text workflows, processing happens in your browser rather than through a Kaazo upload queue.
Thumbnail Maker is a narrow tool on purpose
Create a custom-width thumbnail with cover-style cropping and JPEG or PNG output.
The crop decides what survives at small size
A thumbnail is viewed much smaller than the source. Keep the focal subject and any essential text away from edges that may be cropped on different placements.
Start from a larger source than the final thumbnail.
Where Thumbnail Maker fits cleanly
Make blog-card thumbnails. Create video-cover or listing preview images. Both jobs fit because they ask the tool to do exactly what its output is designed for, without adding an unrelated conversion.
Don’t ask Thumbnail Maker to do a different job
Use a general resizer when you only need dimensions changed without composing a thumbnail-style crop.
FAQ
What does Thumbnail Maker actually do?
Create a custom-width thumbnail with cover-style cropping and JPEG or PNG output.
What should I check before I use the output?
A thumbnail is viewed much smaller than the source. Keep the focal subject and any essential text away from edges that may be cropped on different placements. Start from a larger source than the final thumbnail.
Related tools
After Thumbnail Maker, change something else only if the exported image still has a separate size, crop, format or metadata problem. The image-format guide has broader context if you need it.