How do I convert JPG to PNG?

Add your JPG file to the upload area above, then press Convert. The PNG file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to PNG reduce quality?

No. PNG is a lossless format, so the conversion preserves exactly what is in your JPG file. Note that it cannot recover detail that was already discarded when the JPG was first created — a lossless container does not undo earlier compression.

How large a file can I convert?

Up to 120 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

ImageLosslessRuns in your browser

JPG to PNG Converter

Turn JPG files into PNG in a couple of clicks. The universal lossy photo format. Lossless image format with full alpha transparency. The conversion is lossless — every pixel, sample or byte in the source is preserved.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

JPG files (.jpg, .jpeg, .jpe, .jfif) · up to 120 MB each

or paste files from your clipboard

Ready when you are

Drop a JPG file above and FileTools360 will turn it into PNG — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your JPG files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control dimensions, rotation and metadata removal.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

JPG and PNG explained

JPEG is a lossy image format designed for photographs. It works by discarding detail the human eye is least likely to notice, particularly in colour and in smooth gradients, which is why it compresses photos far better than it compresses text or line art.

PNG is a lossless raster format built to replace GIF. It stores every pixel exactly as given and supports a full 8-bit alpha channel, which means genuine partial transparency rather than the single transparent colour GIF offers.

Where JPG files come from: Digital cameras, phone screenshots on Android, and essentially every photo on the pre-2015 web.
Where PNG is used: Screenshots, exported logos and UI assets, and anything designed rather than photographed.

JPG vs PNG

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

JPG compared with PNG
Property	Source	Target
Compression	Lossy	Lossless
Transparency	No	Yes
Animation	No	No
Introduced	1992	1996
Browser support	Opens everywhere — every browser, OS and device.	Universally supported.

JPG is stronger at: Opens on literally every device, browser and application ever made. Small files for photographic content. Adjustable quality, so you control the size/fidelity trade-off.
PNG is stronger at: Completely lossless — re-saving never degrades the image. Full alpha transparency, including soft edges and shadows. Sharp text and hard edges stay sharp.

Why convert JPG to PNG?

People make this switch when they run into the limits of JPG: the image has transparency, sharp edges, text, or you plan to edit and re-save it repeatedly. PNG is the better fit when the image has transparency, text, screenshots, logos, or you need an exact pixel-for-pixel copy.

JPG limitations that prompt the switch: No transparency — there is no alpha channel at all. Visible artefacts around sharp edges and text. Every re-save degrades the image further (generation loss).
What you give up: Much larger than JPEG or WebP for photographic content. No animation in practice (APNG exists but support is inconsistent).

Does converting JPG to PNG reduce quality?

Going from JPG to PNG moves already-compressed data into a format that stores it exactly. Nothing is lost from this point on, but nothing is recovered either — the detail JPG discarded when the file was first created is gone permanently. Expect a noticeably larger file for identical visual quality.

Saving a JPEG at 100% quality is still lossy — it is a large file that has been through the same discarding process, not a lossless copy.

Converting a JPEG to PNG does not improve its quality. It freezes the image exactly as it already is, artefacts included, in a larger file.

About these formats

Source

JPEG Image

The universal lossy photo format.

Extensions: .jpg, .jpeg, .jpe, .jfif
MIME type: image/jpeg
Best for: Photographs · Email and messaging · Maximum compatibility
Compatibility: Opens everywhere — every browser, OS and device.

Target

Portable Network Graphics

Lossless image format with full alpha transparency.

Extensions: .png
MIME type: image/png
Best for: Transparency · Graphics and logos · Screenshots
Compatibility: Universally supported.

Converting JPG to PNG cannot restore detail that the original encoder already discarded. It preserves exactly what is there today — nothing more.

Good to know