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Upload a JPG, PNG, WebP, or AVIF file from your device or load the built-in example image to test the compression controls immediately.
Image tools
Image Compressor
Source image
Local processingCompressed preview
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Original
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Output
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About this tool
About this tool
Image Compressor reduces image file size by re-encoding graphics inside your browser using HTML5 Canvas and modern browser codecs. You can adjust compression levels and compare visual quality without uploading files to a server.
Reduce the file size of your photographs, screenshots, and web graphics without sending images to an external server. Adjust compression quality interactively, compare visual fidelity in real time, and download optimized files immediately.
Built for daily work
- Reduce image payload sizes before publishing blog posts, e-commerce product catalogs, or documentation.
- Optimize photographs and graphics for faster web page load speeds and improved Core Web Vitals.
- Shrink email attachment sizes by compressing screenshots and diagrams without losing legibility.
- Convert legacy PNG or BMP screenshots into lightweight WebP graphics for web applications.
How to use this tool
How to use this tool
Adjust the compression quality
Move the quality slider between 1 and 100 to balance file size reduction against visual fidelity. Choose whether to keep the original file format or convert to WebP or JPEG.
Review the visual comparison
Check the before and after comparison view to confirm that fine details, gradients, and text remain sharp at the new file size.
Download the optimized image
Save the compressed image file directly to your device. All compression happens locally without server transfers.
Key features
Key features
Real-time quality slider
Adjust the quality control and see the compressed file size and percentage savings recalculate instantly.
Before and after visual inspection
Compare original and compressed versions side by side to ensure your graphics remain crisp.
Modern format support
Compress standard JPG and PNG photos or export to next-generation WebP format for faster webpage loading.
Zero server upload
Your images are decoded and compressed locally in your browser memory so private photos stay secure.
Instant local download
Download optimized files immediately without waiting for queue times, server processing, or email links.
Practical use cases
Practical use cases
- Reduce image payload sizes before publishing blog posts, e-commerce product catalogs, or documentation.
- Optimize photographs and graphics for faster web page load speeds and improved Core Web Vitals.
- Shrink email attachment sizes by compressing screenshots and diagrams without losing legibility.
- Convert legacy PNG or BMP screenshots into lightweight WebP graphics for web applications.
- Prepare images for content management systems with upload file size limits.
Private by default
For local tools, input is processed in your browser and is not sent to application analytics.
Data processing noticeTechnical details
Technical details
Input formatsJPG, PNG, WebP, AVIF, GIF
Output formatsJPG, PNG, WebP, AVIF
ProcessingLocal browser Canvas processing
Task controlsQuality slider, output format selector
Maximum local file25 MB per image file
Workspace featuresBefore/after preview, file size reduction calculations, local download
Limitations and important notes
Limitations and important notes
- Very large multi-megapixel photos depend on available browser memory and device processing capability.
- Converting transparent PNG images to JPEG replaces transparent areas with solid black or white pixels.
- Animated GIF files are processed as single static frames on browser canvas.
- Always verify that compressed images retain required details before deleting original uncompressed source files.
Frequently asked questions
Frequently asked questions
No. All image decoding and re-encoding happens locally in your browser using HTML5 Canvas APIs. Your images are never transmitted over the internet.
A quality setting between 75 and 85 typically provides the best balance between small file size and clean visual fidelity for JPG and WebP images.
Yes. Use the output format setting to switch from PNG to JPEG or WebP when you do not need a transparent background.
AVIF encoding requires modern browser engine support. When AVIF encoding is not available, the tool automatically uses WebP so your download always succeeds.
Related guides and solutions
Related guides and solutions
Compress images for WhatsApp and email
A 6 MB phone photo fails to send or arrives blurry after auto-compression. The [image compressor](tool:image-compressor) shrinks JPG, PNG, and WebP files locally so they fit messaging limits at the right quality.
Learn moreHow to reduce image size for a website without visible quality loss
A practical guide to reducing image size for the web with the [image compressor](tool:image-compressor): why image weight matters, format selection, compression levels, resizing, and verification before publishing.
Learn moreCompress images without uploading them to a server
Every megabyte counts on a slow connection. The [image compressor](tool:image-compressor) shrinks JPG, PNG, and WebP files in your browser, so the original never leaves your device.
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