Compress & Convert Image
Reduce file size or convert between JPEG, PNG, and WebP.
Click to select an image, or drag and drop it here
JPG, PNG, WebP, and other image formats
What Is the Compress & Convert Image?
How Is the Compress & Convert Image Calculated?
The image is drawn onto a canvas at its original resolution, then re-exported in the format and quality you choose. For JPEG and WebP, a lower quality setting compresses more aggressively (smaller file, more detail loss); PNG is always lossless, so its file size depends only on the image content, not a quality setting.
Compress & Convert Image Example
A 2 MB PNG photo converted to JPEG at 80% quality might shrink to around 300-500 KB, since JPEG's lossy compression is far more efficient for photographic images than PNG's lossless compression.
How to Use the Compress & Convert Image
Step 1
Click the upload area or drag and drop an image onto it.
Step 2
Choose an output format: JPEG, WebP, or PNG.
Step 3
For JPEG or WebP, adjust the quality slider — lower means smaller file, more compression.
Step 4
Click Compress & Download to see the resulting size and save the file.
Benefits
- Shrinks large photos for faster uploads and page loads without installing software.
- Processes everything locally in your browser — images are never uploaded anywhere.
- Shows the before/after file size so you can see exactly how much you saved.
Common Compress & Convert Image Scenarios
Scenario 1
Shrinking a phone photo before attaching it to an email with a size limit.
Scenario 2
Converting a PNG screenshot to JPEG or WebP to save space on a website.
Scenario 3
Reducing a batch of product photos to a consistent, smaller file size.
Understanding Your Result
The percentage shown compares the new file's size to the original. JPEG and WebP at lower quality settings produce smaller files with more visible compression artifacts, especially in areas with fine detail or text; PNG never loses quality but often produces a larger file for photos.
Tips
- WebP usually gives the best quality-to-size ratio for photos, if your use case supports it.
- Start around 80% quality for JPEG/WebP — it's a good balance for most photos.
- Use PNG for screenshots, logos, or images with sharp edges and text, where JPEG compression tends to look worse.
Common Mistakes
- Converting a photo to PNG expecting a smaller file — PNG is often larger than JPEG/WebP for photographic images.
- Setting quality too low, which introduces visible blocky artifacts, especially around text and edges.
- Expecting quality to affect PNG output — PNG compression is always lossless.
Frequently Asked Questions
Are my images uploaded to a server?
No, all processing happens locally in your browser using the Canvas API — your images never leave your device.
Which format gives the smallest file size?
For photos, WebP or JPEG at a moderate quality setting is usually smallest. For flat-color graphics like logos or screenshots, PNG can sometimes be smaller too.
Why doesn't the quality slider affect PNG?
PNG uses lossless compression, so there's no quality trade-off to adjust — its file size depends only on the image content.
Does this resize the image too?
No, dimensions stay the same — use the Resize Image tool if you also want to change the pixel dimensions.
Which format is best for photos versus graphics with text?
JPEG generally works best for photos with smooth color gradients, while PNG is better for graphics, logos, or images with sharp text and edges, since PNG's lossless compression preserves crisp detail.
What is WebP, and why would I use it?
WebP is a modern image format that typically achieves smaller file sizes than JPEG or PNG at similar visual quality, though older browsers and some software may have limited support for it.
Does converting between formats always reduce file size?
Not necessarily — the file size change depends on the source format, target format, and quality settings; converting a highly compressed JPEG to PNG, for example, can actually increase file size.
Is compression lossy or lossless?
This depends on the format and settings — JPEG and WebP typically use lossy compression, while PNG uses lossless compression (no quality loss, but generally larger files).
Will repeatedly compressing the same image degrade its quality further each time?
Yes, for lossy formats like JPEG — each re-compression of an already-compressed lossy image introduces additional quality loss, so it's best to compress from the original, uncompressed source when possible.
Important Information
Images are read and re-encoded locally in your browser and are never uploaded to a server.
Last updated: August 1, 2026