Compress Image Online
Reduce file sizes in KB or MB instantly. Safe, private, browser-based compression.
Use this tool to compress images to 100KB, 50KB, or 20KB client-side. The compressor processes JPEG, PNG, and WebP files locally inside your browser memory using the HTML5 Canvas API. By executing a fast binary search on quality settings and resolution scaling, it fits your image under your target KB size limit. No images are uploaded to any server, guaranteeing 100% privacy and offline capability.
Drag & Drop your images here
Supports JPG, PNG, and WEBP. Up to 15MB per file.
How to Compress Images to a Specific File Size (KB / MB)
Need to upload a passport photo under 50KB? Or a document scan under 100KB? Arcdome makes this incredibly simple:
- Upload: Drag and drop your JPEG, PNG, or WEBP files into the upload box above, or click "Browse Files".
- Set Target Size: Under settings, select "Target Size". Enter your target value (e.g., 100) and choose the unit (KB or MB).
- Convert (Optional): If your input is a large PNG, choose output format WEBP or JPG, since PNG is a lossless format and cannot be compressed beyond standard ratios.
- Process: Click "Compress Images". Our algorithm will perform a fast binary search on quality settings and automatically downscale resolution if needed to fit under your limit.
- Download: Click the "Download" button next to each processed item to retrieve your optimized image instantly.
Why Use Local Image Compression?
Most online image compressors require you to upload your files to their servers. Here's why Arcdome's browser-only compression is the superior choice:
100% Secure & Confidential
Your photos are read directly into browser RAM and calculated locally. They never touch a remote server, making this safe for confidential documents, IDs, and signatures.
No Upload & Download Latency
Because there is no network transfer of large raw photos, compression starts instantly and completes in milliseconds. Perfect for users with slow internet connections.
No File Count Limits
Since we do not host server clusters or pay for incoming bandwidth, we do not restrict how many files you can process. Compress hundreds of images completely free.