Compress image files free — shrink JPG and PNG photos for faster web pages, smaller emails, and quicker uploads. No software, no signup, no watermark.
Drop a JPG or PNG to compress
We'll auto-route it to the right tool — Compress JPG for JPEGs, Compress PNG for PNGs.
Supports JPG · JPEG · PNG
Reduce JPG file size with adjustable quality, lossless re-encoding, and target-size mode. Ideal for photos, screenshots, and web uploads — typically halves files at quality 85 with no visible loss.
Compress PNG files losslessly by re-optimizing palettes and removing unused chunks. Preserves transparency. Perfect for icons, logos, and UI graphics where pixel-perfect output matters.
Hit Gmail's 25 MB and Outlook's 20 MB attachment caps without splitting messages.
Boost Core Web Vitals scores and cut hosting bandwidth costs by 60–80 %.
Real-estate, eBay, Etsy and product portals cap each photo at 2–5 MB. Compress in seconds.
Cut Dropbox / Google Drive / iCloud storage costs by half on photo archives.
| Tool | Compression type | Transparency | Typical savings | Best for |
|---|---|---|---|---|
| Compress JPG image | Lossy (or lossless re-encode) | Not supported | 40–70 % at quality 85 | Photos, screenshots, web galleries |
| Compress PNG image | Lossless only | Preserved (alpha channel) | 10–40 % | Logos, icons, UI graphics, line art |
Both compressors run server-side using best-in-class encoders — mozjpeg for JPG and oxipng for PNG. Files are transferred over HTTPS, processed on isolated workers, and automatically deleted within 24 hours. No data is retained, scanned, or used for training.
Lossy compression selectively discards visual detail the human eye is least likely to notice — small colour shifts, micro-contrast in flat regions, fine high-frequency noise. The trade-off is a much smaller file at the cost of some information that can never be recovered. This is what JPG, WebP, AVIF and HEIC all use. The benefit is dramatic: a typical 8 MB phone photo at quality 85 lands around 1.5–2 MB with no perceptible difference to a viewer; the same photo at quality 60 lands around 600 KB with visible softening and minor blocking in flat sky regions.
Lossless compression re-organises the file's data more efficiently without throwing anything away. Every pixel comes out of the compressor mathematically identical to the input pixel. PNG, GIF, and the "lossless" JPG mode all work this way. Savings are more modest — typically 10–40 % for PNG, less for already-optimised assets — but the result is bit-perfect. Lossless is the right choice for logos, screenshots, line art, UI elements, and any image you might re-edit later (each lossy re-save adds more degradation).
The key practical rule: photographs go in JPG (lossy), graphics and screenshots go in PNG (lossless). If the source is a photograph, lossy is invisible. If the source is text, vector art, or anything with sharp edges, lossy introduces visible ringing artefacts at edges and lossless is the only reasonable choice.
JPG quality is a number from 1 to 100. Higher = larger file + more detail preserved. The relationship is not linear — going from quality 95 to 85 typically halves the file, while going from 85 to 75 only saves another 30 %. The diminishing returns make 82–85 the universal sweet spot for photographs.
At quality 85 most JPG photos can be cut in half with no visible difference. PNG compression is always lossless, so it preserves every pixel — but the file-size savings are more modest (typically 10–40 %). For maximum invisible compression on photos, use JPG at quality 82–85. For pixel-perfect output, use lossless PNG.
Yes. Files travel over HTTPS, are processed on isolated workers, never opened for content scanning, and automatically deleted within 24 hours. We don't retain, fingerprint or train models on uploaded files. Read the full privacy policy for details.
Compressing keeps the same file format (JPG stays JPG, PNG stays PNG) but reduces the byte size. Converting changes the format itself (e.g. JPG → PNG, HEIC → JPG). Often you do both — for example, converting HEIC to JPG and compressing it for upload to a portal that doesn't accept HEIC.
Yes. JPG is lossy, so every re-save discards a little more detail. Compressing a JPG once at quality 85 produces no visible difference, but a second pass softens edges and introduces blocking in flat colour areas. Always work from the highest-quality original you have. Use the Lossless mode if you need to re-encode without further loss.
Yes, the Compress JPG image tool has a target-size mode — enter a KB ceiling (e.g. 200 KB) and we'll iterate quality settings to land at or just under your target. Useful for upload portals with strict file-size limits.
