Image Compressor
Compress a JPEG or WebP image to a quality level you set, or straight down to a target file size, without uploading it anywhere.
Compress JPEG and WebP images online to a quality level or a target file size — lossy re-encoding in your browser, so the file never leaves your machine.
Steps and notes
What is Image Compressor?
Shrink a photo to the size you actually need — either by picking a quality level, or by naming a target file size and letting the tool search for the quality that gets there. Everything runs on your own machine: the image is decoded, re-encoded and handed back without a network request, which matters exactly when the file is the thing you least want copied — documents, receipts, photos of a whiteboard, anything with a face in it. Under the hood it is the browser's own JPEG and WebP encoders driven by a quality search: for a target size, the tool bisects the quality range (up to seven attempts) and keeps the highest quality that still fits. That is the same shape of algorithm a desktop "save for web" dialog uses, minus the upload. Expect the honest limits of lossy compression: text and sharp edges start to look noisy before a photograph does, and re-compressing an already-compressed JPEG compounds the damage.
- Pick an image
- Choose JPEG or WebP and either a quality level or a target size in KB
- Compress, compare the before and after numbers, and download
- This is lossy re-encoding: each pass discards data. Start from the original file rather than re-compressing an already-compressed one.
- PNG output is not offered here because lossless re-encoding rarely shrinks a photo — use the resizer or convert to JPEG/WebP instead.
- A target size that cannot be reached is reported as a failure rather than quietly returning a file that ignores your limit.
Frequently asked questions
- How much smaller can I make it?
- Photos typically drop to a fraction of their original size at quality 70-80 with little visible change, and further if you accept softer edges. The tool shows before and after numbers so you can judge the trade instead of guessing.
- Why is my PNG not getting smaller?
- PNG is lossless, so re-encoding a photo as PNG cannot throw information away — it usually grows. For photographs, convert to JPEG or WebP. PNG is the right choice for flat-colour graphics, screenshots of text and anything needing transparency.
- Does the target-size mode always hit my number?
- It returns the highest quality that fits the limit, or fails visibly when even the lowest quality is too large — which usually means the image itself needs resizing first. It will not hand you an oversized file with a reassuring label.
- Will compressing damage my image?
- Yes, lossy compression discards data permanently. Keep the original, and avoid re-compressing a file that was already a JPEG — each pass adds its own artefacts on top of the last.
- Is it safe for documents with personal information?
- For this tool, yes in the sense that nothing is uploaded: the file is read and rewritten locally by your browser. What you should still not do is paste a sensitive file into an unknown online converter that sends it to a server and tells you to trust its retention policy.
Category: Images and videos
Image tools workflow
Image Resizer → Image Compressor → Image Cropper → Images to PDF → Favicon Generator → SVG placeholder generator → Camera Recorder