Image Converter
Convert PNG, JPG, and WebP images locally in your browser. No upload required — your files stay on your device.
Drop your image here
or click to select a file
JPG, PNG, WebP, BMP, GIF, AVIF, TIFF · up to 50 MB
Convert Image Online — Without Uploading Anything
Switch between PNG, JPG, and WebP entirely in your browser. Drop a file, pick a format, and download the converted image — no server, no signup, no watermark.
Everything You Need in a Browser-Based Image Converter
PNG to JPG, JPG to PNG, or modern WebP — pick a format and we handle the rest, locally.
PNG to JPG
Shrink large transparent screenshots into compact photo files for email or messaging.
Choose JPEG output and the converter flattens transparency onto a white background, then encodes a quality-controlled JPG.
JPG to PNG
Move JPGs into a lossless PNG container — handy for editing, layering, or transparency masks.
Note that JPG-to-PNG cannot recover detail removed by JPEG compression, but no further loss is added.
WebP Converter
Encode photos as WebP for smaller files at the same visible quality on modern browsers.
WebP is supported in current Chrome, Edge, Firefox, and Safari. The converter detects support automatically.
Quality Control
Tune JPEG and WebP output with a quality slider. PNG output stays lossless by design.
Defaults to 92 — a balanced setting for photos. Drop to 75 for tighter files, push to 100 for archival JPEGs.
Wide Input Support
Read JPG, PNG, WebP, BMP, GIF, AVIF, and TIFF files — anything your browser can decode.
Animated GIFs are converted to a still image of the first frame.
Local Processing
Conversion happens via the Canvas API right inside this tab. Files are never uploaded.
After the page loads you can disconnect from the internet and the tool keeps working.
Inside the pipeline
How to Convert an Image
Drop your image
Drag a JPG, PNG, WebP, BMP, GIF, AVIF, or TIFF file into the upload area, or click to browse.
Pick the output format
Choose PNG for transparency, JPEG for small photo files, or WebP for modern compression.
Adjust quality
For JPEG and WebP, drag the quality slider to balance file size against visual fidelity.
Convert and download
Click Convert. The new file is generated locally and downloads to your device — no upload, no waiting.
Why MacroKit Image Converter?
Built for fast, private image conversion — no server round-trip, no watermark, no account.
Zero Upload
Files are decoded and re-encoded in your browser tab using the Canvas API. They never leave your device.
No Queue
Conversion starts the moment you click the button. No waiting for a server worker to free up.
No Account
No signup, no email, no subscription. Open the tool and start converting immediately.
No Watermarks
The converted image is clean — no logos, no embedded promo text, no extra metadata stamps.
Works Offline
Once the page is loaded, you can disconnect and continue converting images locally.
Fast on Big Files
Up to 50 MB per image. Conversion speed is bounded by your device, not by upload bandwidth.
How Browser-Based Image Conversion Works
MacroKit decodes the source image into an HTML Canvas, then asks the browser to re-encode the canvas as PNG, JPEG, or WebP. The output blob is wrapped in a local download — no server roundtrip is involved.
▸ All processing happens in your browser tab. Closing the tab cancels any in-progress conversion.
PNG is lossless and supports transparency. JPEG is lossy and best for photos but cannot store transparency. WebP is a modern lossy/lossless format that typically produces smaller files than JPEG at the same visual quality.
MacroKit vs Other Image Converters
See how a browser-based image converter compares to typical online tools.
Frequently Asked Questions
Is this image converter really free?+
Are my images uploaded to a server?+
Can I convert PNG to JPG?+
Can I convert JPG to PNG?+
Does the WebP converter work in every browser?+
What input formats are supported?+
What is the maximum file size?+
Why does the quality slider only affect JPEG and WebP?+
More Free Tools
Privacy & Security
MacroKit Image Converter runs entirely in your browser using the Canvas API. No image data is transmitted to any server. Files are read from your local device and the converted result downloads directly to your device.
Ready to convert an image?
Drop a file above and download the converted version in seconds — no upload, no signup.