onvert
Local-first · No upload

Convert files
without the cloud.

Pick a tool below — every conversion runs in your browser, so your files are never uploaded. No sign-up, no ads.

Files never leave your device.

Convert images

Convert any image

Any format in — JPG, PNG, WebP, AVIF, ICO out. Batch convert, crop, resize and download as a ZIP.

Open converter
HEIC to JPGiPhone photos that open everywhereAVIF to JPGMake AVIF open in any appJPG to AVIFShrink JPGs ~50% for the webAVIF to PNGLossless, transparency keptPNG to AVIFShrink heavy PNGs, keep alphaWebP to AVIFEven smaller than WebPImage to ICOGenerate .ico favicons from any image

Compress & PDF

Compress imageShrink a photo to a target size in KB without the quality falling apart.PDF toolsPDF to images and back, plus merge & split — all in the browser.
How it works

Three steps. Zero uploads.

  1. 01

    Choose files

    Drag or pick files from your device. Nothing is sent anywhere.

  2. 02

    Pick a format or size

    JPG, PNG, WebP or AVIF — or compress to a target size.

  3. 03

    Download

    Converted locally in your browser. Then it's yours.

FAQ

Questions, answered.

No. onvert converts files entirely in your browser using WebAssembly. Your files never leave your device and our servers never receive them.

With onvert, yes — because nothing is uploaded. Many online converters send your files to a server you don't control; onvert converts everything locally in your browser, so your images never leave your device and there's nothing to intercept or leak.

Yes. Once the page has loaded, conversion runs locally in your browser, so it keeps working even without a connection.

You can convert HEIC, JPG, PNG, WebP, AVIF, TIFF and SVG images to JPG, PNG, WebP, AVIF or ICO — all in your browser.

Yes. Converting files is completely free, with no sign-up and no ads.

No. We never receive your files, so we cannot store, read, or share them.

Coming soon · Pro

OCR — make scans & photos searchable

We're building OCR and document intelligence. AI features will run on a dedicated server, with explicit consent and immediate deletion — always kept separate from the local mode you trust.

Need PDFs now? Free PDF tools →