Reduce Image Size Online Free

Check whether the receiving service specifies a file-size maximum, pixel dimensions, accepted formats or a combination. A 1000-pixel-wide image is not automatically a 100KB file, and a 100KB file may still have the wrong dimensions. Enter the stated KB or MB allowance first. This page uses decimal units, so 500KB means 500,000 bytes and 1MB means 1,000,000 bytes.

The initial 500KB value is a starting point, not a recommendation for every image. If you already know that a JPEG must fit 200KB, the 200KB JPG tool opens that exact workflow. For a transparent graphic with a strict limit, Compress PNG to 100KB keeps the PNG-specific controls and guidance together. Use the custom target here for other allowances or mixed formats.

Compression reduces the information stored per picture; resizing changes the number of pixels that need to be stored. These methods can work together. A photo displayed at a small width rarely needs the full pixel count of its camera source, but an image intended for detailed inspection may. Use the resize fields when you know the desired starting dimensions, and keep the aspect ratio locked unless stretching is intentional.

After opening a file, choose whether to keep its format or save as another supported format. JPG suits photographs when transparency is unnecessary. PNG is useful for transparent graphics and screenshots, although reducing its palette can change colors. WebP is worth comparing for a website that accepts it. Image to WebP offers a dedicated conversion workflow when format is your main concern.

A successful reduction should preserve the information people need. Check faces, product details, small text and smooth color transitions in the preview and downloaded file. The tool shows original and output sizes, the percentage change and final dimensions. In target mode it also says whether the maximum was reached. If the target was missed, the output is a best attempt and should not be treated as compliant with that limit.

An already optimized image may not shrink when encoded again at a higher quality. When the original already fits and no format or dimension change is requested, this tool returns it unchanged. Otherwise, compare the new copy with the original and keep whichever better serves the task. Avoid repeatedly compressing a compressed JPEG, because successive lossy saves can accumulate artifacts without providing a useful saving.

The tool is free, requires no signup and processes your picture in the browser on your device. No image is uploaded to a compression server, and there is no added watermark. On a phone, select an image from your files or photo library and allow processing to finish before closing the tab. Larger dimensions and limited device memory can increase the time required.

Keep the source image separately for future edits or print work. The smaller copy is intended for the task you selected, not necessarily as a replacement for your best original. If your main goal is to change width and height without pursuing a byte target, use Resize Image. If the original is HEIC or AVIF, convert it with the appropriate conversion tool before using this JPG, PNG and WebP compressor.