Reduce Image Size in KB

No. Everything runs entirely in your browser. Your image never leaves your device — there are zero uploads, no server processing, and no cloud storage. This means your photos stay completely private, even if they contain sensitive content.

You can upload JPG, PNG, WebP, and AVIF images (including pasting from clipboard). The tool compresses images as JPEG (standard) or WebP (via "More Options") to achieve the best quality at your target file size. You can also export to PDF or copy the image to your clipboard.

To reduce image size in KB or decrease photo size, our tool uses a smart binary-search algorithm. It finds the highest possible quality setting that keeps your photo or picture just under your chosen target size. It tests multiple quality levels automatically and picks the sweet spot — so you always get the best image within your limit, not just a blindly-compressed file.

There's no enforced file size limit — but since all processing happens in your browser, very large images (50 MB+) may be slower depending on your device. For best performance, images under 20 MB are recommended. Mobile devices may have lower memory limits than desktops.

Yes! The tool is fully responsive and works on all modern smartphones and tablets. You can tap to pick an image from your camera roll, or share an image directly from your Photos app. Processing speed depends on your device's CPU and available memory.

The core image processing features are free to use — no account required. We may introduce optional accounts in the future to unlock premium features like custom presets and saved settings. The tool may also display ads to support ongoing development and server costs. Your images will always be processed privately in your browser, regardless of plan.

Simple mode (the default homepage) focuses on one task: compress to a target file size with one click. Advanced mode gives you fine-grained control over output dimensions, quality, format selection, cropping, and more — ideal for power users who need precise control over every parameter.

After processing your image, click the "More Options" button (⋯) next to the Download button, then select "Save as PDF". The image will be embedded into a PDF document perfectly sized to the page — no extra white borders. This also happens entirely in your browser.

JPG and JPEG are exactly the same format — JPEG is the full name (Joint Photographic Experts Group) and JPG is the shorter extension that became common on older Windows systems. There is zero difference in quality or file contents. If you upload a .jpg and need it as .jpeg (or vice versa), click the "More Options" button (⋯) after processing and select the alternate extension option — it re-saves your file instantly with no re-compression.

Yes, you can. If you need to increase image size in KB or make a photo or picture larger in KB (for example, to pass validation on visa, government, or employment portals), you can set a higher target size in the tool. We will re-save your image with less compression to increase the file size. Please note: This does not increase the physical resolution or upscale the pixels of the image; it simply re-encodes the picture at a higher quality setting to produce a larger file size honestly and safely in your browser.

Each format uses a distinct structure and encoding algorithm:

• JPEG & WebP: WebP is a more modern format that compresses files more efficiently than JPEG. When you choose Save as WebP, the tool dynamically re-compresses the image using the WebP encoder to hit your target size.
• PDF Document: A PDF is a document format, not a raw image. Wrapping an image inside a PDF adds about 3 to 4 KB of structural overhead (page definitions, metadata, and coordinates). To make sure the final PDF is strictly under your target limit, the tool automatically calculates this overhead and compresses the underlying image slightly more to offset it.