What this guide covers
Reduce image file size in batches with JPG or WebP quality controls, optional downscaling, before-and-after comparison, and private browser processing. Add one or more images, choose WebP or JPG and a quality level, optionally limit the width, then select Compress Images. PNG export is lossless, but JPG and lossy WebP trade some image data for a smaller file. Use a higher quality value and compare the preview when detail matters.
Reduce image file size in batches with JPG or WebP quality controls, optional downscaling, before-and-after comparison, and private browser processing.
Image Compressor re-encodes photos and graphics as WebP, JPG, or PNG and can optionally reduce their pixel width. Add up to 20 images, compare the original and compressed file sizes, then download one result or a ZIP.
JPG and WebP quality control the trade-off between visual detail and encoded file size. WebP is a practical default for web images; JPG works well for photos but removes transparency. A maximum width can reduce both dimensions proportionally without upscaling smaller files.
The tool reports the real output size and does not guarantee that every export becomes smaller. PNG export is lossless and ignores the quality slider, so re-encoding a PNG can produce a similar or larger file. Animated GIF input uses its first frame, and JPG replaces transparent pixels with white.
Before you start
- Keep the original file and work from a copy.
- Decide the required order, layout, and output format before processing.
- Test with a small sample and check the preview before exporting everything.
Recommended workflow
- 1
Add your images
Choose up to 20 JPG, PNG, WebP, AVIF, GIF, or BMP files.
- 2
Choose compression settings
Select WebP, JPG, or PNG, adjust quality where available, and optionally set a maximum width.
- 3
Compare and download
Check actual before-and-after sizes, then download one image or all results as a ZIP.
- 4
Review the complete output
Open the downloaded result and check order, cropping, readability, orientation, and file size.
Choose the right path
| Situation | Use | Why |
|---|---|---|
| Website and store images | Image Compressor | Make product photos, blog images, and landing-page graphics lighter before publishing. |
| Email and form uploads | Image Compressor | Reduce large camera photos to more practical dimensions for messages, forms, and portals. |
| Batch asset handoff | Image Compressor | Apply one output format and quality setting to several images and download a single ZIP. |
Common mistakes
- Starting without deciding the final order or layout.
- Trusting the preview without opening the downloaded file.
- Using maximum compression or cropping before checking important details.
Final checklist
- The original file is unchanged.
- Order and orientation are correct.
- Text and important details remain readable.
- The output opens in another viewer.
- The file format and size fit the sharing channel.
FAQ
How do I compress an image online?
Add one or more images, choose WebP or JPG and a quality level, optionally limit the width, then select Compress Images.
Can I compress an image without losing quality?
PNG export is lossless, but JPG and lossy WebP trade some image data for a smaller file. Use a higher quality value and compare the preview when detail matters.
Why did my compressed image become larger?
A new format, high quality, or a well-optimized source can create a larger result. The tool shows the real change so you can lower quality, reduce width, or keep the original.
Can this tool compress an image to an exact KB size?
No. Quality and dimensions influence file size, but the tool does not target an exact KB or MB value.