Image Compressor

Image compression is one of the most impactful optimizations you can make for website performance, email deliverability, and storage costs. Large image files slow down page loads, get rejected by upload forms, and consume unnecessary bandwidth. This tool lets you compress JPG, PNG, WebP, and GIF images directly on your device, with no upload, no account, and no waiting for a server to process your file. The output format always matches your input: upload a PNG and get a compressed PNG back, upload a JPG and get a compressed JPG. Whether you need to shrink a photograph for social media, hit a specific KB limit for a form, or optimize images for web pages, the Image Compressor gives you precise control in seconds.

How to use

1. Open your image. Drag a JPG, PNG, WebP, or GIF file onto the drop zone, or click to open your file browser. The preview and a default compressed version load immediately so you can compare and adjust.
2. Choose your compression method. Drag the Quality slider to balance file size and visual quality (default is 80%, which is visually indistinguishable from the original for most photographs). Alternatively, switch to Target MB and type a maximum file size in megabytes and the tool automatically finds the highest quality level that fits under your limit.
3. Review the result. The compressed preview and new file size appear instantly. The savings badge shows how much smaller the output is compared to the original.
4. Download. Click Save to save the compressed file. The output format matches your input. JPG stays JPG, PNG stays PNG.

Tips for best results

• Start at 80–85% quality. For most photographs, 80–85% quality looks identical to the original on screen while cutting file size by 40–60%. Drop lower only if you need the smallest possible file and can accept minor compression artifacts.
• Use Target MB for form uploads. If you're trying to meet a hard limit (many government forms cap attachments at 200 KB, 500 KB, or 1 MB), use the Target MB mode. Type the limit as a decimal (e.g., 0.2 for 200 KB, 0.5 for 500 KB). It takes the guesswork out of hitting exact size requirements.
• Resize first, then compress. If you also need to reduce the image dimensions, use the Image Resizer first. Fewer pixels means less data for the compressor to work with, so you'll get better results at the same quality level.
• PNG compression is limited. PNG is a lossless format, so the quality slider has less effect than on JPG. If you need a dramatically smaller file from a PNG, consider converting it to JPG first using the image converter, then compressing the result.

Why use PixMidas

• 100% private. Compression runs entirely on your device using the HTML5 Canvas API. Your image never leaves your device. No uploads, no cloud processing, and no third-party servers involved at any stage.
• Two compression modes. Quality % gives you manual control over the size-quality trade-off. Target MB mode is ideal when you have a hard upload limit such as an email attachment restriction, a government form cap, or a CMS upload threshold.
• Format preserved. The output is always the same format as your input. Upload JPG, get JPG. Upload PNG, get PNG. No unexpected format changes.
• No account needed. Open the tool and start compressing immediately, no signup required. No watermarks added.

Frequently asked questions

What formats are supported?

JPG, PNG, WebP, and GIF files are all accepted as input. The compressed file uses the same format as your input. Upload a PNG and get a compressed PNG back, or upload a JPG and get a compressed JPG. If you need to change formats, use the image converter.

Can I compress HEIC files?

HEIC files need to be converted to JPG or PNG first. The browser's Canvas API cannot decode HEIC directly. Use HEIC to JPG to convert your iPhone photos, then compress the resulting JPG here.

Why is there no resize option?

This tool is focused on one job: reducing file size through compression, without changing the image dimensions. If you need to resize, use the Image Resizer. Keeping the tools separate makes each one faster and simpler to use.

Does compressing an image reduce quality?

Yes, but only perceptibly at aggressive settings. JPEG compression works by selectively discarding fine detail that the eye is unlikely to notice at normal viewing sizes. At 80–85% quality, most photographs look identical to the original on screen while being significantly smaller in file size. If you push below 70%, artifacts such as blockiness and color banding can become visible, especially in smooth gradients and sky areas.

What does Target MB mode do exactly?

Instead of picking a quality percentage yourself, Target MB lets you specify the maximum file size in megabytes (e.g., 0.5 for 500 KB, 1.0 for 1 MB). The tool runs an internal binary search, testing progressively lower quality levels, until it finds the highest quality that still keeps the output under your specified limit. This is much faster and more reliable than manually adjusting the slider when you need to meet an exact size constraint.

Are my images uploaded to a server?

Never. All compression happens using the browser's built-in Canvas API. Your image is read into browser memory via the File API, processed locally by JavaScript, and written back out as a downloadable file, all without any network request. Your image exists only in your device's memory and is cleared when you close the tab.

How much smaller will my image get?

Typical reductions are 40–70% depending on the original image content and your chosen quality setting. A 3 MB smartphone photo can often drop below 500 KB at 80% quality with no perceptible difference on screen. Images with large areas of uniform color (like backgrounds and logos) tend to compress more aggressively than photographs with high detail.