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Compress JPG, PNG, WebP, and AVIF images online for free. Reduce image file size without losing visual quality. Fast bulk compressor.
Shrink your JPEG, PNG, WebP, and AVIF files to a fraction of their original size without visible quality loss. Drag multiple photos at once, set a global quality target, and get a clean ZIP download — all processed right inside your browser tab. Looking for a serverless alternative? Read our TinyPNG alternative and iLoveIMG alternative benchmarks.
Original RAW Camera Shot (4000×3000)
Web-Ready Output (Zero Loss)
How to Use
Drag a folder or multi-select files. PNG, JPEG, WebP, AVIF, GIF, BMP, and TIFF are supported.
Start at 82% for photos and 90% for graphics with text. Use lossless mode only when pixels must stay bit-identical.
Open the before/after preview at 100% zoom on a detail area (text edge, hair, logo stroke) before batch export.
Apply the same setting to the full queue. Processing runs locally — speed depends on your CPU, not upload bandwidth.
Export as ZIP, spot-check 2–3 files, then optionally run winners through WebP conversion for another 25–35% savings.
Start at 80–85% for JPEG product shots. Run one file through the preview at 100% zoom — if label text and fabric weave stay crisp, apply the same setting to the batch. Logos and UI screenshots on PNG often need 90% or lossless mode.
Use our 'Smart Compression' at 80% quality. For web images, this typically yields a 70-90% size reduction while remaining indistinguishable from the original to the human eye.
Lossy compression removes imperceptible color data and high-frequency noise to achieve massive 70–90% file reductions. Lossless compression rearranges image data into smaller binary clusters with 0% pixel loss (ideal for diagrams, typography, and logos).
Resize first, then compress. Downsampling removes unnecessary pixels first, giving you much smaller output files and faster batch processing.
Compressing an image to an exact target KB size produces very different visual clarity depending on the format you select: JPEG is best for photos because its lossy compression discards imperceptible high-frequency color data smoothly, delivering clean, sharp images at low KB caps. PNG is designed for lossless graphics and transparency; forcing a complex photo into a tight PNG KB limit requires heavy color quantization (reducing to 64–256 indexed colors), causing noticeable color banding and grainy dithering. WebP is modern and versatile, delivering 25–35% better compression than JPEG at identical clarity. AVIF offers next-gen compression with superior detail preservation at ultra-low bitrates.
Changing pixel dimensions (width and height) has an exponential (quadratic) effect on file size because digital images store data per pixel (Width × Height). For example, halving dimensions by 50% (such as downscaling 4000×3000 to 2000×1500) reduces the total pixel count by 75%—from 12 million to 3 million pixels. With 4× fewer pixels to encode, file size drops drastically while still looking crisp on phone and laptop screens. Conversely, increasing dimensions quadruples pixel count, heavily inflating file size without creating new optical detail. When targeting strict file sizes, reducing dimensions slightly is often the most effective way to shrink KB without degrading compression quality.
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