How to compress an image
- Drop your JPG, PNG or WEBP files into the box above or press Browse files.
- Set the quality slider. Start at 80 for photos.
- Pick an output format. Keep the original or switch to JPG or WEBP for bigger savings.
- Press Compress and read the saving for each file.
- Save each image or download them all in one ZIP file.
What this image compressor gives you
- JPG, PNG and WEBP files in the same batch.
- An exact saving per file plus a total for the batch.
- A format switch that often saves more than the slider alone.
- The same width and height as your original image.
- Removal of EXIF camera and location data.
- Twenty files per run with no daily limit and no watermark.
What does an image compressor do?
An image compressor makes the file smaller. It does not make the picture smaller on screen. It cuts the number of bytes needed to describe the same grid of pixels.
That is how a 4 MB photo can become 400 KB and still fill the same space on your page. The saving comes from detail your eye is bad at noticing. Think of tiny color shifts in smooth areas or fine detail in busy textures.
How much you can drop depends on the picture. A forest photo hides a lot of loss because the detail is already messy. A spreadsheet screenshot shows every flaw. Flat color and sharp text are the hardest things to compress.
Why use an image compressor?
- Page speed: images are often the heaviest part of a web page. Smaller images help your page show up faster.
- Email: most mail servers reject attachments over 10 or 25 MB. Compressed photos slip under that limit.
- Storage: phone backups and client archives shrink a lot with no visible change.
- Uploads: marketplaces, job portals and site builders set size caps per image.
- Data costs: visitors on mobile data pay for every kilobyte you send.
How to read the quality slider
The number is not a percent of quality you keep. It is a setting for the encoder. The link to what you see is not a straight line.
| Quality | File size | What you see |
|---|---|---|
| 90 to 100 | Drops a lot | Almost no change |
| 75 to 90 | Keeps dropping | Slight softness up close |
| Below 65 | Very small | Blocky skies and halos on edges |
The best method is to test. Run a batch at 80. Look at the numbers. Open one result and check it. Adjust only if you need to. Most people find they were compressing too little.
Switch formats for bigger savings
The slider is only one lever. A PNG photo is the classic case. PNG is lossless. So the slider has little room to work. The format itself is the problem.
Switch that PNG photo to JPG or WEBP. You often save 80 to 95 percent. No PNG setting comes close.
- WEBP: the smallest of the three. Every current browser supports it. Best for websites.
- JPG: the safest choice for email and older upload forms.
- PNG: keep it for logos and graphics that need clear backgrounds.
Want a tool with fewer choices? The JPG compressor and the PNG to JPG converter use the same engine.
Resize first for the biggest win
Your photo might be 6000 pixels wide. Your blog may show it at 800. Compression alone solves the wrong problem there.
A smaller size cuts pixels fast. Half the width and height leaves only a quarter of the data. That happens before any compression at all. Run the photo through the image resizer first. Then compress the result. The two steps together save far more than either one alone.
Image compressor tips from everyday use
- Keep your originals. Lossy compression cannot be undone.
- Use 90 or higher for screenshots with small text.
- Use 75 to 80 for blog photos and product shots.
- Crop empty space with the image cropper before you compress.
- Use the same setting for a whole gallery so it looks consistent.
Who uses an image compressor?
Bloggers shrink photos so posts load fast on phones. Store owners trim product shots so listings meet size caps. Students compress project photos to email them to teachers. Real estate agents send big sets of house photos to clients. Each one keeps the look and loses the extra weight.
How this image compressor protects your privacy
Every step runs inside your browser. The tool decodes each file, redraws it and saves it again in local memory. No copy goes to a server. No one keeps your files.
There is a bonus side effect. The redraw keeps only pixels. So EXIF data such as camera details and GPS location drops off. That is helpful before you post photos online.
Need a lighter web format? Try the JPG to WEBP converter. Have PNG graphics? The PNG compressor keeps transparency and still shrinks the file.