Image Compressor

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Upload a PNG or JPG to compress it automatically: PNGs with gradient transparency use truecolor compression, otherwise they are converted to 256-color indexed mode; JPGs are re-encoded at 80% quality. All metadata (EXIF, ICC, XMP, etc.) is stripped, and the before/after file sizes and savings ratio are shown

Features

The Image Compressor reduces the file size of PNG and JPG images with as little quality loss as possible, making them easier to store, share, and load on the web. Once you upload an image, the tool automatically:

  • Compresses PNGs intelligently: It analyzes the transparency channel first. Opaque images or those with only binary transparency are converted to 256-color indexed mode for a significant size reduction; images with gradient transparency (such as shadows or feathered edges) keep truecolor and use high-quality compression to avoid banding or hard edges.
  • Re-encodes JPGs at 80% quality: A good balance between quality and file size.
  • Strips all metadata: EXIF, ICC, XMP, and other blocks are removed automatically, reducing size and protecting privacy such as camera details.
  • Shows a clear size comparison: The before/after file sizes and the savings ratio are displayed for immediate feedback.

The tool always picks the smaller result, so you get the most efficient compression for your image.

How it works

After the tool receives an image, it validates the format (PNG and JPG only) and analyzes the channel and transparency characteristics. Images without gradient transparency can be losslessly converted to a 256-color palette (indexed) mode, drastically reducing size; images with gradient transparency keep their full color and alpha information and use a more refined compression path to avoid quality loss.

For JPGs, the tool re-encodes the image data at a consistent lower quality level. Regardless of format, the re-encoding process naturally discards the EXIF, ICC, and XMP metadata blocks carried by the original, achieving the "metadata removal" effect.

Finally, the tool generates both an indexed result and a truecolor result, compares the actual file sizes, and returns the smaller one, ensuring you always get the best output for the given image.

Use cases

  • Web optimization: compress images before uploading to noticeably speed up page loads
  • Messaging: smaller images transfer faster and use less data over email and chat
  • Privacy: removing EXIF and other metadata prevents leaking details such as device and location
  • Storage: batch-compress everyday photos or design assets to free up local and cloud space

FAQ

Q: Which formats are supported?
A: PNG and JPG (JPEG). For other formats, convert to PNG or JPG first.
Q: When does a PNG become indexed mode?
A: When the image is opaque or has only binary transparency (no gradient), it is converted to 256-color indexed mode to reduce size. Images with shadows or feathered gradient transparency keep truecolor compression to avoid quality loss.
Q: Will image quality be degraded?
A: The tool picks the smaller result. For indexed-mode scenarios quality loss is nearly imperceptible; for gradient-transparent images it keeps truecolor to protect quality as much as possible.
Q: Does removing metadata affect the image itself?
A: No. Metadata (EXIF, ICC, XMP, etc.) is descriptive information attached to the image; removing it does not affect the pixel content or display.
Q: Can I download the compressed image?
A: Yes. The result area includes a download button for the compressed image.

Typical usage

Compress an image for your web page:

  1. Click or drag to upload a PNG or JPG image
  2. Wait for compression and review the before/after size comparison and savings ratio
  3. Click the "Download" button to save the compressed image
  4. Upload the compressed image to your site or share it

If the original is already very small, the savings may be modest, which is normal; the tool always returns the smallest result.

Related tools

This tool belongs to the design group alongside Image to ICO Icon, Image Color Picker, Color Palette, and Color Converter: Image Compressor reduces file size, Image to ICO Icon turns an image into website icons, Image Color Picker samples colors from an image, Color Palette generates a gradient series from a single color, and Color Converter translates between color models. To handle compressed image data further, you can also pair it with Base64 Encoder and MIME Type Lookup.

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