No size cap, no server upload, faster processing, and stronger privacy
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Local compression and format conversion
This browser-based tool handles both image compression and image format conversion for JPG, PNG, and WebP. You can compress images, convert single files, or convert and download a ZIP in batches without uploading files to a remote server, which makes it useful for website assets, ecommerce photos, social visuals, and everyday screenshots.
Compression runs locally with WebAssembly and Web Workers, so your files stay on the current device. It works well for product shots, screenshots, blog assets, and sensitive images.
After compression, you can convert the result to JPG, PNG, or WebP and download it right away. Batch conversion to a ZIP is also available for common tasks like PNG to JPG or JPG to WebP exports.
Add many images at once, compare the output size, and export them through single downloads, single-file conversion, or batch ZIP downloads. It is designed for website assets, ecommerce images, and social media visuals.
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If you compress images first and bundle them later, or want to jump back to the main tool hub, you can switch from here in one step.
Main hub
The home site gathers the image tool, file tool, and future utilities in one clearer entry point so it is easier to move between jobs.
Related tool
After image work is done, you can continue in file.kithub.pro to pack assets, documents, or export results with local archive creation and extraction.
FAQ
These are the questions most people ask before using an online image compressor and format converter.
No. The compression flow runs locally in the browser, powered by WebAssembly, so images are not sent to a remote processing server.
The tool currently supports JPG, PNG, and WebP for both input and export. You can compress these formats and also convert the result into JPG, PNG, or WebP before downloading.
Yes. After compression, open Convert on a single image and choose JPG, PNG, or WebP for an immediate download. You can also use Convert and download ZIP to export converted results in one batch.
Yes. You can add many images in one batch, and the queue will show progress, output size changes, and export options in the same view.
Start with lossless compression to preserve the original image as much as possible. If a PNG still needs to shrink further, or if a JPG or WebP needs a smaller file, switch to lossy compression and tune the strength after checking the preview.
Some files are already highly optimized, or they contain complex visual detail that does not compress much further without visible quality loss. In those cases the tool keeps the tradeoff conservative and may preserve the original result.