useSignal logouseSignal

Image Converter

Convert images without uploading them

Convert HEIC, WebP, AVIF, PNG, and JPG images directly on your device. Drop files, pick a format, download — nothing is uploaded to a server.

Conversion runs locally in your browser — private by architecture, not by policy.

Drop images here or click to browse

Converted locally — files never leave your browser.

Convert to

Free, no signup, no upload — conversion happens on your device.

A local image converter for every common format

Convert HEIC, WebP, AVIF, PNG, and JPG images directly on your device. Drop files, pick a format, download — nothing is uploaded to a server.

Why use it

Why convert images in the browser

Convert private photos and screenshots without sending them to a conversion server.

Batch-convert multiple files at once with per-file downloads or one download-all action.

Control JPEG, WebP, and AVIF quality with a slider instead of accepting a fixed setting.

Skip the upload and download queue entirely — local conversion starts instantly.

How it works

How the image converter works

  1. 1

    Drop images into the converter or click to browse — HEIC, WebP, AVIF, PNG, JPG, GIF, and BMP are supported.

  2. 2

    Pick the output format and adjust quality for lossy formats.

  3. 3

    Download converted files individually or all at once.

Use cases

Image conversion use cases

Convert iPhone HEIC photos to JPG before uploading to sites that reject HEIC.Turn downloaded WebP images into PNG or JPG for editing tools and documents.Convert modern AVIF images into universally supported formats.Flatten transparent PNGs to JPG for smaller email attachments.Batch-convert a folder of mixed formats into one consistent format.

FAQ

Image converter questions

Are my images uploaded anywhere?

No. Decoding and encoding happen in your browser using native codecs and local WebAssembly. Files never leave your device.

Which input formats are supported?

HEIC/HEIF, WebP, AVIF, PNG, JPG, GIF, and BMP as inputs; JPG, PNG, WebP, and AVIF as outputs.

Can I convert HEIC photos from an iPhone?

Yes. HEIC files are decoded locally with a WebAssembly decoder that loads on demand, then exported to JPG, PNG, WebP, or AVIF.

Can I convert multiple images at once?

Yes. Drop any number of files and they convert in sequence, with individual downloads or a download-all button.

Is there a file size limit?

There is no artificial limit — capacity depends on your device's memory since conversion runs locally.

What happens to transparency when converting to JPG?

JPG has no alpha channel, so transparent areas are flattened onto a white background. Choose PNG or WebP to keep transparency.

Popular use cases

Related useSignal tools