Image Compressor

Reduce an image's file size while keeping the quality you need. Adjust quality, limit the dimensions if needed and click Compress to download the result — your image is never uploaded.

Drop an image here, or click to choose

PNG, JPG or WebP · up to 40 megapixels

Processed privately in this browser. Nothing is uploaded.

Format

Max long edge (px, optional)

Quality — 75%

Resizing saves far more than the quality slider — a 4000px photo posted at 1080px is 90% wasted bytes.

How it works

Choose an image, adjust any options you need and click the main button. The result downloads immediately, and your file stays on your device from start to finish.

1
Choose an image
Pick an image from your device. It stays on your device and no copy is uploaded.
2
Set the options
Adjust the simple controls until the size, format or look matches what you need.
3
Click the action button
Click Convert, Compress, Crop or Enhance. The finished image downloads to your device immediately.

What you get

Simple tools, clear results, no unnecessary steps

Resizing saves more than the slider

A 4000-pixel photo posted at 1080 wastes about 90 percent of its bytes on pixels nobody sees. Capping the long edge is usually a bigger win than any quality setting, and costs nothing visible.

You see what you saved

The result line shows the new size and what percentage of the original it is, so you can tell whether the last adjustment did anything worth keeping.

Your file never leaves the device

Your image stays private on your device. It is never uploaded or stored by Spira.

No account needed

Start immediately with no sign-up, email address or watermark.

Fast and easy to retry

See results quickly and try as many settings as you like until the image looks right.

Quality, dimensions, and which to reach for first

Start by resizing an image that is larger than its destination needs. This often saves more space than lowering quality and can look exactly the same when posted. Then reduce quality gradually, stopping before skies, gradients or fine details begin to look rough.

Why WebP is the better target for the web

WebP usually creates a smaller file at similar visual quality, making it a good default for websites. Choose JPG when an older publishing tool, print service or upload form does not accept WebP.

FAQ

How much can I compress before it looks bad?

For photographs, quality 75 to 80 is usually indistinguishable from the original at normal viewing size. Below about 60 you start seeing blocking in skies and smooth gradients, which is where compression artefacts show first.

Should I resize or lower the quality?

Resize first if the image is larger than it needs to be — it saves more and costs nothing visible. Use the quality slider for the rest, after the dimensions are right.

Does compressing twice make it worse?

Yes. Repeated compression can gradually soften details and add visible artifacts. For the best result, always start again from the original image.

Is the image uploaded to compress it?

No. Your image stays on your device and is never stored by Spira. You can safely try different settings before choosing the best result.

When the image is only the start

Spira AI takes a script or a link and produces a finished short with voiceover, visuals and captions, then publishes it on a schedule. These small tools are the pieces you reach for along the way.