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Compress and Resize Images Online
Reduce image dimensions or adjust compression for JPG, PNG and WebP output. Use the quality and resize controls to prepare photos for websites, email or uploads.
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Compress Images
Compress and resize images
How to reduce image file size
Prepare the source
Select the images you want to compress.
Review the settings
Choose an output format, quality and any needed resize setting.
Check the result
Start Conversion and compare the downloaded image size and appearance with the original.
Supported formats and limitations
Input: JPG, JPEG, PNG, WEBP, BMP. Output: JPG, PNG, WebP. A smaller file is not guaranteed for every source. Lossy compression can remove detail; JPG and WebP output flatten transparency onto white.
Processing runs on the server after you select Start Conversion. The interface accepts files up to 500 MB; service and connection limits can be lower. No installation or account is required. Read our file processing privacy policy.
Why Use ConvertFast's Compress Images?
- Resize images by the available dimension controls.
- Apply the same output settings to a batch of photos.
Frequently Asked Questions
Does a lower quality setting always help?
Lower lossy quality often reduces size but can introduce artifacts. Check text, faces and gradients at the intended display size.
Should I resize a large photo too?
Reducing pixel dimensions can help when the destination does not need the original resolution. Keep the original for future edits.
Ready? It's Free.
No account required. Input rules appear before you upload.
Open Compress Images ToolNeed more detail? Read the step-by-step Compress Images guide.