JPG to PNG Converter

This page converts JPEG (Joint Photographic Experts Group) files into PNG (Portable Network Graphics) using Convert Image, and everything runs inside your browser, so the file never touches a server. A lossy raster format tuned for photographs, with adjustable quality. A lossless raster image format with full alpha transparency. The conversion itself takes a moment; the useful part is knowing what changes along the way — which is what the rest of this page covers.

Open Convert Image Runs in your browser — no upload

How to

How to use JPG to PNG Converter

Four steps, no account, nothing to install.

1
Add your images
Drag files onto the dropzone or click to browse. Nothing is uploaded — the files are read locally.
2
Pick the output format
Choose the target format; the tool selects sensible encoder defaults for it.
3
Tune quality if it applies
For lossy targets, move the quality slider and watch the projected file size update.
4
Download the result
Save each converted image, or grab them all at once.

Overview

What you need to know

What does converting JPG to PNG actually do?

JPEG discards detail the human eye is least likely to notice, which is why a photo can shrink by 80–90% with no obvious visual difference. The trade-offs are permanent: there is no alpha channel, and every re-save recompresses the image, so repeated editing slowly degrades it. PNG stores pixels losslessly, so an image survives any number of edit-and-save cycles without degrading, and it carries an 8-bit alpha channel for genuine transparency. That fidelity is why it is the standard for logos, icons, UI screenshots and any graphic with sharp edges or flat colour. Converting JPG to PNG therefore re-encodes the same content under a different set of rules — the pixels are decoded from the source image and written out through the destination encoder. Nothing is uploaded: the decode-and-re-encode cycle happens on your own machine.

Why convert JPG to PNG?

Lossless — no compression artefacts, Full alpha transparency, Crisp text and line art — those are the reasons people move off JPG. In practice the trigger is usually one of three things: a platform that only accepts PNG, a size budget that JPG cannot meet, or a workflow step downstream that expects PNG. Lossy — artefacts accumulate on re-save is the limitation people hit most often with JPG, and lossless — no compression artefacts is what PNG offers in return.

Quality and file size

Converting JPG to PNG cannot restore detail that JPG already discarded: the output is a lossless copy of the compressed pixels, so expect a noticeably larger file rather than a sharper image.

Transparency and colour

PNG supports transparency, but converting from JPG does not create it: a JPG source is fully opaque, so the result is an opaque image in a format that *could* carry alpha. Use the background remover if you actually need a cut-out.

Features

What the tool gives you

Batch convert several images in one pass

Quality slider for lossy output formats

Original and converted file sizes shown side by side

Downloads individually or as a set

Reference

Format details

Property	JPG	PNG
Extension	.jpg	.png
MIME type	image/jpeg	image/png
Compression	Lossy	Lossless
Transparency	No	Yes
Animation	No	No
Typical size	the smallest common choice for photographic content	large for photographs, small for flat-colour graphics

Examples

Real situations this solves

Publishing to the web

A designer exports JPG assets, but the site's performance budget is tight. Converting to PNG — large for photographs, small for flat-colour graphics — keeps the visual result while cutting transfer weight.

Preparing an upload

Some platforms accept only specific formats. Logos and icons is a typical destination, and rejecting the upload for the wrong extension is a five-second fix here rather than a round trip through desktop software.

Archiving the original

Keep the JPG source under version control. PNG is the delivery format; the original stays authoritative if the mapping ever needs revisiting.

Benefits

Why use TheToolSera

Runs locally — JPG files are never uploaded, stored or logged
No sign-up, no watermark and no daily conversion cap
Batch friendly: convert one JPG file or a whole folder's worth
Works on desktop, tablet and phone with the same interface
Immediate feedback on the resulting PNG file size

FAQ

Frequently asked questions

Is converting JPG to PNG free?

Yes. The JPG to PNG converter is free with no account, no watermark and no limit on how many files you convert.

Are my JPG files uploaded to a server?

No. The conversion runs in your browser using local APIs, so the file never leaves your device. That also means it keeps working on a flaky connection.

Will converting JPG to PNG reduce the quality?

Converting JPG to PNG cannot restore detail that JPG already discarded: the output is a lossless copy of the compressed pixels, so expect a noticeably larger file rather than a sharper image.

Does PNG keep the transparency from my JPG file?

Can I convert PNG back to JPG?

Yes — the same tool converts in both directions where both formats are supported. Remember that a round trip through a lossy format does not recover detail that was already discarded.

How large a file can I convert?

There is no server-side limit because nothing is uploaded. The practical ceiling is your device's memory, which comfortably handles everyday JPG files.

Which browsers support the JPG to PNG converter?

Any current version of Chrome, Edge, Firefox or Safari on desktop or mobile. Note: raster output is rendered at the source image's pixel dimensions.

Tools

Explore

PNG format guideA lossless raster image format with full alpha transparency. Learn where PNG shines, where it does not, and use free browser tools to work with .png files.JPG format guideA lossy raster format tuned for photographs, with adjustable quality. Learn where JPG shines, where it does not, and use free browser tools to work with .j…PNG to JPG ConverterConvert PNG to JPG in your browser. Because JPG is lossy, this conversion permanently removes some detail in exchange for a much smaller file. Free, no sig…JPG to WebP ConverterConvert JPG to WebP in your browser. Both formats compress efficiently, so the practical question is compatibility and weight rather than visible quality —…PNG to WebP ConverterConvert PNG to WebP in your browser. Because WebP is lossy, this conversion permanently removes some detail in exchange for a much smaller file. Free, no s…SVG to PNG ConverterConvert SVG to PNG in your browser. Both formats compress efficiently, so the practical question is compatibility and weight rather than visible quality —…

Learn

Guides from the Learning Center

PNG vs JPG vs WebP: Which Image Format to UseCompare PNG, JPG, WebP and AVIF on compression, transparency, quality and browser support, with a simple decision guide for photos, screenshots, logos and animation.How to Compress a PDF Without Wrecking the QualityUnderstand what actually makes a PDF large, which compression settings matter, how much size you can realistically save, and how to compress a PDF privately in your browser.How to Compress Images for the WebA practical guide to image compression: lossy vs lossless, choosing quality levels, resizing before compressing, format choice, and compressing images in your browser.