Compress Images Online
Reduce file size of your JPG, PNG and WebP images instantly. Free, no limits, and completely private — nothing is uploaded to any server.
100% Private — Your files never leave your device. All processing happens in your browser.
Drop your images here
or click to select — JPG, PNG, WebP supported
80%
Smaller file Better quality
Results
How does the image compressor work?
This tool uses your browser's built-in image processing capabilities (Canvas API) to re-encode your images at a lower quality setting. The entire process runs locally on your device — your images are never sent to any server. Not a single byte leaves your computer.
Tips for Better Image Compression
- Start at 80% quality — For most photographs, a quality setting between 75–85% offers the best balance between file size and visual fidelity. The human eye rarely notices differences above 80%.
- Choose WebP for modern use — If your images are destined for the web, WebP delivers 25–35% smaller files than JPEG at equivalent quality. All major browsers (Chrome, Firefox, Safari, Edge) now support it.
- Use JPEG for photos, PNG for graphics — JPEG compression excels with photographic content (gradients, complex colors). PNG is better for screenshots, logos, and images with sharp edges or text.
- Compress before uploading — Reducing file size before uploading to social media, email, or your website saves bandwidth and speeds up load times for your visitors.
- Batch process for efficiency — Drop multiple images at once to compress an entire folder in seconds. Use "Download All" to grab everything in one click.
- Compare before and after — Always check the file size reduction shown in the results. If the savings are minimal, try lowering the quality slider by 5–10 points.
- Keep originals as backup — Since compression is lossy (for JPEG/WebP), always keep your original high-resolution files. ImgLab never modifies your source files — it creates new compressed copies.
When to Compress Your Images
- Website optimization — Large images are the #1 cause of slow-loading websites. Compressing product photos, hero banners, and blog images can cut page load times by 40–60%, improving both user experience and SEO rankings.
- Email attachments — Most email providers limit attachment size to 25 MB. Compressing high-resolution photos lets you share more images in a single email without hitting size limits.
- Social media uploads — Platforms like Instagram, Facebook, and Twitter re-compress your images anyway. Pre-compressing gives you more control over the final quality and avoids double compression artifacts.
- Cloud storage savings — If you sync thousands of photos to Google Drive, iCloud, or Dropbox, compression can free up significant storage space without noticeable quality loss.
- E-commerce product listings — Online marketplaces often have file size requirements. Compressed images load faster in search results, leading to higher click-through rates and better conversions.
- Document preparation — When embedding images in PDFs, Word documents, or presentations, compressed images keep the document file size manageable.
Frequently Asked Questions
Is it really free?
Yes, completely free with no hidden limits. We are funded by ads displayed on the page — we never sell your data or access your files. Compress as many images as you want, as often as you want.
Are my images safe?
Your images never leave your device. There is zero network traffic during processing — you can verify this by opening your browser's Developer Tools (Network tab). We physically cannot see or access your files.
What formats are supported?
You can compress and convert between JPEG, PNG, and WebP formats. Input any of these formats and choose your desired output format.
Why is my PNG file larger after compression?
PNG is a lossless format — the quality slider has no effect on PNG output. If you need a smaller file size, try converting to JPEG or WebP instead.
What is WebP?
WebP is a modern image format developed by Google that provides superior compression for images on the web. It typically achieves 25-35% smaller file sizes compared to JPEG at equivalent visual quality.
Does this work offline?
Yes! Once this page is loaded, you can disconnect from the internet and the tool will continue to work perfectly since all processing is done locally.
What is the difference between lossy and lossless compression?
Lossy compression (JPEG, WebP) permanently removes some image data to achieve smaller files — the lower the quality setting, the more data is discarded. Lossless compression (PNG) reduces file size without any quality loss by finding more efficient ways to encode the same data. For photographs, lossy compression at 80% quality is usually indistinguishable from the original.
Can I compress multiple images at once?
Yes! Simply drag and drop multiple files or select several images at once. ImgLab will compress all of them using your chosen quality setting and output format. Use the "Download All" button to save every compressed image in one click.
What quality setting should I use?
It depends on your use case. For web images, 70–80% offers a good balance. For print or archival purposes, stay above 90%. For social media where platforms re-compress anyway, 75% is usually sufficient. The preview lets you compare quality before downloading.
Is there a file size limit?
There is no hard limit since everything runs in your browser. However, very large images (50+ MP) may be slow to process depending on your device's memory and processing power. For best performance, images up to 20 MP work smoothly on most devices.
Does compression remove image metadata (EXIF data)?
Yes — when ImgLab compresses your image using the Canvas API, metadata such as EXIF, IPTC, and XMP data is automatically stripped. This includes camera settings, GPS coordinates, and timestamps. If you need to preserve metadata, consider using our Metadata Viewer to inspect it first.
How much can I reduce my file size?
Typical results vary by source image and format. A 5 MB JPEG photo at 80% quality usually compresses to 1–2 MB (60–80% reduction). Switching to WebP can yield even better results — up to 35% smaller than the equivalent JPEG. PNG files with many colors may see modest reductions, while screenshots and graphics with flat colors can shrink dramatically.