Image Converter
Universal format, best for photos. No transparency.
Conversion runs entirely in your browser — your image never leaves your device.
Image Converter
Convert images between the formats every platform demands — JPEG, PNG, WebP and AVIF — without uploading a single byte. Drop in a photo (HEIC from your iPhone works too), pick the target format, adjust quality, and download the result. A live size comparison shows exactly what the conversion did to your file.
Convert HEIC, WebP & AVIF — Without Uploading Anything
Most online converters are upload-disguised-as-tools: your files travel to someone else's server, wait in a queue, and come back changed. VectMint converts locally — the browser reads your image, decodes it, re-encodes it and hands you the result. Nothing is transmitted, stored or logged.
Formats the browser can't handle natively are covered too: iPhone HEIC photos decode through a WASM decoder loaded in the page, and AVIF output is produced by a WASM encoder — both running on your machine.
Pick the Right Format for the Job
JPEG stays the universal choice for photographs — every device, marketplace and CMS accepts it. PNG keeps transparency and pixel-perfect detail for graphics and screenshots. WebP is the modern web standard: dramatically smaller than JPEG with alpha support. AVIF pushes compression further still, often 20-50% smaller than WebP at the same visual quality.
See the Savings Before You Download
After converting, the result panel shows the original and converted file sizes side by side with the percentage change — so you know whether the quality slider is doing its job before the file ever lands in your downloads folder. HEIC photos typically shrink 50-70% when converted to JPEG at quality 90.
Popular conversions & presets
Frequently Asked Questions
Which image formats can I convert between?
Input: JPEG, PNG, WebP, AVIF, GIF (first frame), BMP, HEIC/HEIF and SVG. Output: JPEG, PNG, WebP or AVIF. The tool detects the source format automatically.
How do I convert iPhone HEIC photos to JPG?
Drop the .heic file into the converter, keep JPEG selected as the target, adjust quality if you like, and click Convert. The HEIC decoding happens in your browser through a WASM decoder — the photo is never uploaded anywhere.
Are my images uploaded to a server?
No. The entire conversion pipeline — decoding, re-encoding and downloading — runs inside your browser tab. There is no upload step, no queue and no server-side storage.
Which output format should I choose?
JPEG for photos that need to work everywhere. PNG for transparency, screenshots and graphics. WebP for web images where you control the stack. AVIF for the smallest possible files at the same visual quality — ideal for page-speed-critical sites.
Why did my converted file get larger than the original?
Formats compress differently, and re-encoding an already well-compressed image can add bytes — converting a high-efficiency AVIF to PNG will always grow. The size comparison in the result panel shows the change; lower the quality slider for lossy formats to shrink the output.