Compress Images Online — Smart Compression with Target Size

You control the quality level. At 85% quality (Balanced preset), most images look identical to the original while being 50–70% smaller. At 70% (Web preset), files are even smaller with differences barely visible for photographs.

Target Size mode lets you specify an exact file size in KB (e.g., 200KB for email). The tool uses a binary search algorithm to automatically find the optimal quality setting that produces a file within 5% of your target.

PNG uses lossless compression — the browser's quality parameter has no effect. To reduce PNG file size, switch the output format to JPEG (for photos) or WebP (for modern browsers). WhiskFile detects this and suggests the switch automatically.

Yes. Enable the Resize toggle and choose either Scale mode (percentage-based, e.g., 50%) or Max Dimensions mode (e.g., 1920×1080) which preserves aspect ratio.

Input: JPG, PNG, WebP, BMP, GIF, and AVIF. Output: JPEG, WebP, or PNG. You can also convert between formats during compression — for example, convert a BMP to JPEG for massive file size reduction.

No. All compression happens 100% in your browser using client-side JavaScript and the Canvas API. Your images never leave your device, ensuring complete privacy. Unlike TinyPNG or Compressor.io, nothing is uploaded.

Yes. Use Target Size mode — enter your desired KB and the tool adjusts quality using a binary search algorithm to hit your target within 5% accuracy.

No. WhiskFile processes everything in your browser, so there are no server-imposed limits. Compress as many images as you need — performance depends only on your device.

Yes. WhiskFile works in any modern mobile browser — Safari on iOS, Chrome on Android. No app needed. Compress iPhone or Android camera photos directly.

Yes. Use Target Size mode to compress under your email limit (typically 200KB–2MB). The tool shows exact file sizes so you can verify before sending.

Yes. Compress for faster page loading and better Core Web Vitals. Convert PNGs to JPEG or WebP for maximum savings. No server upload means images stay private.

After the page loads, the compressor works without an internet connection. All processing uses client-side JavaScript — no server communication needed.

Lossy (JPEG, WebP) discards imperceptible data for 50–90% size reduction. Lossless (PNG) preserves every pixel but offers minimal compression. For photos, lossy at 85% quality is visually identical to the original.

Yes. Compress Image on WhiskFile is completely free with no account required. Free users get 7 tasks per day with files up to 50 MB. There are no watermarks on any plan. Pro plans ($4.99/month) unlock unlimited tasks, 500 MB files, batch processing, and API access.

Yes. Compress Image runs entirely in your browser using WebAssembly. Your files are never uploaded to any server — they stay on your device throughout the entire process. No data is transmitted, stored, or accessible to WhiskFile or any third party.

Compress Image accepts JPG, JPEG, PNG, WEBP, BMP files as input and produces JPG, PNG, WEBP output. The maximum file size is 50 MB on the free plan (500 MB for Pro users). There are no page count limits.