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Lossy vs. Lossless Compression: The Difference That Actually Matters

Lossy trades quality for size; lossless trades size for perfect fidelity. Pick the wrong one and you're wasting bandwidth or permanently degrading your assets.

What the JPEG Quality Slider Actually Does (It's Not What You Think)

Quality 80 is not "80% of the original". It's a quantisation table scalar. Here's how the DCT-based encoding actually works and what settings to use.

How Browsers Actually Handle Your Images

File size is half the story. After bytes arrive, browsers decode and composite images in ways that affect memory and rendering. Here's what actually happens.

Those Weird Blotches Around Text: A Field Guide to Compression Artifacts

Blotchy gradients, halos around text, pixelated blocks, compression artifacts have specific names and causes. Learn what triggers each one and how to avoid them.

Choosing the Right Image Format: A Practical Guide From the Compression Side

JPEG, PNG, WebP, or AVIF? This practical guide explains every format's compression model so you pick the right one every time. Free converter included.

How Client-Side Processing Saves Your Data (And Our Server Costs)

When a browser tool processes your files locally, your data never leaves your device. A transparent look at the privacy, business, and engineering case for client-side processing.

Building a Private Image Compressor with WebAssembly

How ImagePDF.Tools uses pngquant WASM, OffscreenCanvas, and Web Workers to compress images entirely in the browser, zero server uploads, full privacy.