Image Compressor & Resizer
Shrink image file size in your browser: set a maximum dimension and quality, see before/after sizes instantly. Nothing is uploaded.
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Where the Megabytes Go
Two levers shrink an image: dimensions and compression quality. Dimensions dominate — a 4000×3000 phone photo resized to 1600 px wide drops to ~16% of its pixels before quality even enters. Quality 75-85% JPG is visually near-identical to 100% at a fraction of the size. Together, a 6 MB photo typically lands under 300 KB, fine for web pages, forms and email.
Everything runs on a canvas in your browser — the photo never leaves your device. The tool preserves aspect ratio, never upscales, and shows old → new size per file so you can judge the trade.
Frequently Asked Questions
What settings for a website?
Content images: max 1600-2000 px on the long edge, JPG/WebP at 75-82%. Thumbnails: 400-800 px. Full-screen hero images: up to 2560 px, quality nearer 70 to compensate.
Why did my PNG barely shrink?
The quality slider only affects lossy formats (JPG/WebP). For a PNG screenshot, the dimension cap does the work — or convert to WebP for a big drop.
Does resizing lose quality permanently?
Yes — removed pixels do not come back. Keep the original file; export compressed copies for each use.
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Image Compressor & Resizer