How to compress images and reduce their size
Modern phone photos are large, and an application site or platform may refuse them for being over the size limit. Compressing a photo reduces its size while keeping it clear enough for most uses.
Filezain’s Compress Images re-saves your photos at the quality you choose, inside your browser.
When you need it
- Uploading a portrait or document photo to a site with a size limit.
- Emailing many photos.
- Lightening photos before putting them in a report or presentation.
- Saving storage space.
Steps
- Open Compress Images and choose one or more images.
- Move the quality slider: a lower number means a smaller file.
- Press the convert button.
- Compare the new size and download the images.
Tips
- The default quality (0.7) is a good balance between size and clarity for most photos.
- Compression works best on JPG. PNG images stay PNG and the slider hardly affects them; to shrink them, convert to JPG or WEBP first.
- Don’t compress the same image over and over — quality drops each time.
- For photos of documents, 0.6–0.75 keeps text readable.
Common problems and fixes
- My PNG barely changed in size.
- The PNG format isn’t affected by the quality slider. Convert it to JPG with JPG ⇄ PNG, then compress.
- The image became blurry.
- Raise the quality and compress again from the original.
- HEIC photos aren’t accepted.
- Convert them first with HEIC to JPG.
- Not all images downloaded on my iPhone.
- Tap each image’s download button separately.
Frequently asked questions
Can I compress several images at once?
Yes.
Which formats are supported?
JPG, PNG and WEBP.
Are my photos uploaded?
No, compression happens in your browser.
Do the dimensions change?
No, width and height stay the same; only the file size changes.