Online Image Compressor

How to Compress Images with TinyImg

Compressing images with TinyImg takes seconds. Here's a step-by-step walkthrough:

1. Select your compression settings. Use the quality slider to choose your desired compression level (default: 80%). Lower values produce smaller files but may introduce visible artifacts. For most web images, 70–85% quality is the sweet spot where file size drops significantly without noticeable quality loss.
2. Choose an output format. Select Auto to let TinyImg pick the best format, or force JPG (best for photographs), PNG (best for graphics with transparency), or WebP (best overall for modern browsers, offering 25–35% smaller files than JPG at equivalent quality).
3. Set a maximum width (optional). If your images will be displayed at a fixed width (e.g., a 1280px content area), select a max width to automatically resize images that exceed it. A 4000px-wide photo displayed at 800px wastes 96% of its pixels — resizing is one of the most effective ways to reduce file size.
4. Drag and drop your images. Add up to 20 images at once. TinyImg supports JPG, PNG, WebP, and GIF formats. All files stay in your browser — nothing is uploaded.
5. Click "Compress" and download. Review the results showing original size, compressed size, and savings percentage. Download individual files or grab them all as a ZIP archive.

How TinyImg Compresses Images

TinyImg uses the HTML5 Canvas API to re-encode your images at the quality level you specify. When you drop an image into the tool, your browser reads the file locally using the File API, draws it onto a canvas element, and then exports the canvas content back to an image using canvas.toBlob() with your chosen quality parameter.

This process is identical to what server-based compressors like TinyPNG do — the difference is where it happens. Server-based tools upload your image to their server, process it there, and send the result back. TinyImg does everything inside your browser using JavaScript. No network round-trip, no upload bandwidth, and critically, no copy of your image on anyone's server.

The Canvas API leverages your device's GPU for fast processing, which is why compression typically completes in milliseconds even for large images. The quality slider directly maps to the encoding quality parameter — at 80%, the encoder discards fine detail data that the human eye is least likely to perceive.

Why Local Processing Matters

Most online image compressors require you to upload your files to their servers. This creates three problems:

• Privacy risk. Once your image leaves your device, you have no control over how long it's stored, who can access it, or whether it's used for training AI models. For sensitive images — medical scans, legal documents, confidential business assets, personal photos — this is a dealbreaker.
• Speed and bandwidth cost. Uploading a batch of 20 high-resolution photos can take minutes on a slow connection and consume significant mobile data. With TinyImg, processing starts instantly because there's nothing to upload.
• File size limits. Server-based tools impose upload limits (often 5–20MB per file) to protect their infrastructure. Since TinyImg processes locally, the only limit is your device's available memory.

TinyImg's local-first approach means your images never exist outside your browser session. When you close the tab, the data is gone. This makes it safe to use for any image, from a casual screenshot to a confidential contract scan.

Frequently Asked Questions