Image Compressor
Reduce a photo's file size before sharing or uploading.
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Choose a JPEG, PNG, or WebP image and set a target in KB. The browser adjusts JPEG quality and shows the result; complex images may not reach the target without substantial quality loss.
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What does an image compressor change?
This tool encodes a local image as JPEG and adjusts quality to make a smaller copy, aiming for—but not guaranteeing—a chosen file size.
Compression can reduce detail or introduce artifacts; compare the preview before using the exported copy.
How compression works
Balancing Image File Size and Quality
Image compression makes a file smaller by changing how image information is encoded. JPEG uses lossy compression, so lowering its quality can reduce file size while also discarding visual detail; fine textures, text, gradients, and sharp edges may show artifacts sooner than photos with smooth areas. The requested size is a best-effort target because the browser's encoder and image content constrain the available output. This tool creates a new JPEG copy in the browser rather than altering the selected original. It is useful when an upload has a file-size limit or a photo needs to load faster, but the smallest file is not always the best choice. Inspect the preview at an appropriate size and retain the original for future edits.
Key Features
💡 Pro Tips
- →Start with a target that meets the upload limit, then choose the best-looking preview rather than forcing the smallest possible file.
- →Keep the original image, especially before reducing quality for an archive or later edit.
Common Mistakes
Expecting a target size to be guaranteed
Image complexity and browser encoding affect the result, so some images cannot reach a requested size without unacceptable quality loss.
Compressing a graphic with text as though it were a photograph
JPEG artifacts can blur small lettering and crisp edges; compare formats and inspect the output at its intended display size.
Last updated: 2026-10-27
Table of Contents
Quick Facts
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Frequently Asked Questions
Will the result always meet my exact target?
No. Image content and browser encoders affect output size. The tool reports when the target could not be reached.
Does compression preserve the original?
The selected file is not modified; a separate result is generated for download.
Can I compress a PNG with this tool?
You can select a PNG, but the compressor exports a JPEG. JPEG has no transparency, so transparent areas are filled white.
Does a smaller file always look good enough?
Not necessarily. Lower JPEG quality can create visible artifacts; compare the preview at the size where you plan to use the image.