Convert
Convert images without uploading them
Convert images between JPG, PNG, WebP, and HEIC formats, in batches, without your photos ever leaving the device.
For the best results: Select a batch and pick the target format, JPG for photos, PNG for lossless, WebP for the web. HEIC decodes right in the browser, no upload.
Advanced settingsoptional, defaults work well
Processed entirely in your browser, your photos are never uploaded, logged, or stored.
What is Image Converter?
Image Converter is a free file converter that converts images between JPG, PNG, WebP, and HEIC in batches, with every file staying on your device. Each image is decoded and re-encoded by your own browser's graphics engine, so your photos are never uploaded to a server. There is no queue, no watermark, and no account to create, and it keeps working with your connection off.
- ✦Runs entirely in your browser. Nothing you enter is ever uploaded
- ✦No account, no sign-up, and no data leaves your device
- ✦Works offline once the page has loaded
See it in action
A designer receives iPhone HEIC photos and WhatsApp WebP stickers and needs everything as clean JPGs and PNGs.
What you drop in
photo.heic + sticker.webp chosen together, Convert to set per run
What you get
photo.jpg with correct colors (HEIC decoded on-device), and sticker.png with its transparency fully preserved, corner pixels still fully transparent after conversion.
Tip: Transparency survives PNG and WebP conversions but JPG has no alpha channel, so the advanced Background setting decides what fills it, white by default. Quality is a real dial: in testing the same image was 13 KB at 10% and 222 KB at 100%.
Use cases
What people use it for
Convert a folder of iPhone HEIC photos into JPGs your Android and Windows relatives can actually open.
Turn PNG screenshots into WebP so a documentation site loads faster without visible quality loss.
Batch-convert product shots into the one format your marketplace listing template will accept.
Who uses Image Converter?
Online sellers
convert supplier photos into whichever format each marketplace demands, without pushing unreleased product imagery through a third-party server
Bloggers and site editors
move article images into WebP to cut page weight and improve loading speed for readers on mobile connections
Office administrators
standardize mixed batches of staff-submitted photos into a single format before dropping them into reports and intranet pages
How it works
- 1Choose your files. They open in your browser, not on a server.
- 2Your device converts, compresses, or resizes them locally, with no upload.
- 3The converted files download straight back; nothing is kept anywhere.
Tips for the best results
- Pick WebP for anything destined for a web page, and JPG for email attachments or documents where compatibility matters most.
- Keep screenshots and text-heavy graphics in PNG or lossless WebP so lettering stays sharp.
- Always keep your original files; convert copies, especially when the target format is lossy.
- Select an entire folder of images at once rather than converting one file at a time.
- The first HEIC file can take a moment while the decoder loads; every file after that converts faster.
FAQ
Frequently asked questions
Which format should I choose for photos, and which for graphics?
Photographs suit JPG or lossy WebP, because both discard fine detail the eye rarely misses and produce small files. Screenshots, logos, and anything with sharp text belong in PNG or lossless WebP, which reproduce every pixel exactly and keep edges crisp. WebP usually beats the older formats on size either way, while HEIC is space-efficient but mostly an Apple-ecosystem format.
Are my images uploaded anywhere during conversion?
No. Each file is decoded and re-encoded inside the browser tab itself, using your own machine's processor, so the pictures never cross the network. You can load this page, switch to flight mode, and keep converting. That is the core difference from the big converter sites, which push every file through their servers before handing back a download.
How can this convert HEIC without a server?
The page ships with a WebAssembly decoder that understands HEIC's underlying HEVC compression. When you drop an iPhone photo in, that decoder runs directly on your CPU, unpacks the image into raw pixels, and the browser re-encodes it into your chosen format. Everything happens in local memory, which is why it works even with the internet disconnected.
Is there a limit on how many images I can convert?
There is no cap, no queue, and no watermark. Because your files never touch our infrastructure, there is nothing for us to meter or charge for, so batch away. Drop an entire folder's worth in one go and the browser works through them at whatever speed your computer manages, which for most machines is a fraction of a second per image.
Will converting change the quality of my image?
It depends on the target. Converting into PNG is lossless, so nothing degrades. Converting into JPG or lossy WebP re-encodes the image and discards some detail, though at high quality the difference is invisible. Note that going the other way, say JPG to PNG, cannot restore detail the original JPG already threw away. Avoid repeated lossy round trips on the same photo.
Is it safe to convert images online?
It is safe only when the site never receives your files. Most converters upload images to a server, where they may be logged or retained under vague policies. This converter does the decoding and encoding inside your browser, so private photos, ID scans, and client artwork stay on your device from start to finish.
What image format is best for a website?
WebP is the strongest all-rounder for the web today: it compresses photos more efficiently than JPG, handles transparency like PNG, and every modern browser displays it. Use JPG as a fallback for very old software, and reserve PNG for images where pixel-perfect text or line art matters more than file size.
Can you convert HEIC to JPG on Windows?
Yes, and a browser is the easiest route, because Windows often lacks the HEVC codec needed to open HEIC natively. Drop the photos into this page and download JPGs a moment later. Nothing installs, nothing uploads, and the same approach works identically on a Mac, a Chromebook, or Linux.
Are there any usage limits?
None. Everything is generated locally in your browser, so there is no server cost, no metering, and no daily cap, use it as many times as you like, completely free.
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