Image Compression and Format Choice
Tell file size, pixel dimensions, and image format apart, and find a suitable method for upload limits, website images, and transparent images.
Tools in this topic
- Image CompressorCompress one image to a downloadable JPEG inside your browser.
- compress image to KBImages stay in your browser, not uploaded to LocalTools
- bulk image compressorImages stay in your browser, not uploaded to LocalTools
- Resize Image OnlineResize and download without the image ever being uploaded.
- Image ConverterDecoding and encoding are done by the browser, on this device.
- WebP ConverterEncoding is done by the browser's own canvas, on this device.
Related guides
- How to compress an image that is too large: choose quality, target KB, or resize firstUse a practical decision flow to separate ordinary image compression, compression to a specific KB value, pixel resizing, and WebP conversion, so different problems do not get mixed together.
- How to compress an image below a specified KB value: settings before uploadFor registration, avatar, and form-upload scenarios with KB limits, explains the tradeoffs around target size, maximum size, JPEG/WebP output, and failure handling.
- How to batch-compress website images: unified size, format, and ZIP download flowExplains how to set shared format, quality, and maximum size for batch compression of website or product images, and how to understand ZIP downloads, failed rows, and results that do not get smaller.
- Resize an image without distortion: aspect ratio, pixels, and export formatExplains how to lock the aspect ratio when resizing an image, distinguish pixels from file size, and choose PNG, JPG, or WebP for export.
- How to choose JPG, PNG, or WebP: check transparency, size, and compatibility before convertingBefore converting image formats, choose between JPG, PNG, and WebP based on photos, transparent graphics, web loading, and platform compatibility.
- Will PNG/JPG to WebP look blurry? Quality slider, transparent background, and compatibilityExplains the practical tradeoffs in image quality, transparent backgrounds, file size, and browser compatibility when converting PNG or JPG to WebP.