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Z Image Tools

JPG to PNG Converter — Lossless, In-Browser Image Conversion

Convert JPG to lossless PNG entirely in your browser. Files never upload.

Free No signup Client-side Privacy friendly Updated

Drop an image here, or

Max 25 MB. Files never leave your browser.

Source

× · ·

Output

Processing…

× · ·

How to use

  1. 1 Drop a JPG or click to browse (max 25 MB).
  2. 2 PNG conversion runs automatically.
  3. 3 Download the PNG output.

Why use this tool

  • 100% client-side — your image never uploads.
  • Lossless PNG output preserves every pixel.
  • Strips EXIF metadata on re-encode — privacy positive.
  • Free, no signup, no watermark.

Frequently asked questions

Why is the PNG file larger than the JPG?

PNG is lossless — it stores every pixel exactly. JPG uses lossy compression so its files are typically much smaller. Conversion back to lossless cannot recover removed detail and produces a larger file.

Does this work for animated images?

No — animated formats like GIF and animated WebP convert to a single still PNG (first frame only).

Is EXIF metadata preserved?

No — re-encoding via canvas strips EXIF, IPTC, and ICC profile data. Useful for privacy, but be aware if you depend on metadata.

What is JPG to PNG Converter?

A JPG to PNG Converter is a tool that changes JPG and JPEG images into the lossless PNG format. It runs entirely in the browser using client-side processing, so files are never uploaded to a server. The conversion produces PNG output that preserves image detail without the compression artifacts associated with JPEG, suitable for graphics, transparency-ready workflows, and further editing.

Features

Lossless PNG re-encode

Decodes the source JPG with createImageBitmap() and draws it to a canvas, then encodes to image/png at quality 1 — PNG's lossless compression preserves every pixel of the decoded image at its original width and height.

Runs entirely in the browser

Conversion uses only browser-side Canvas and File APIs. No file is sent to a server, so nothing about the image leaves the device during processing.

Converts automatically on drop

As soon as a file is dropped or selected, it is validated and converted immediately — there is no separate convert button to press before download.

Strips EXIF and color-profile metadata

Because the output is rebuilt from decoded pixel data on a canvas, EXIF (including camera and GPS data), IPTC, and embedded ICC profile metadata from the original JPG are not carried over to the PNG.

Example

Input

vacation.jpg — 3024x4032, 2.3 MB, JPEG with camera EXIF and GPS metadata

Output

vacation.png — 3024x4032, ~9.6 MB, lossless PNG, EXIF/GPS metadata stripped

Common use cases

  1. 1

    Prep a JPG for a transparency-ready workflow

    Convert a JPG to PNG before adding an alpha channel or compositing in a design tool, since PNG supports transparency and JPG does not.

  2. 2

    Avoid further generation loss on repeated edits

    Convert once to PNG so subsequent edits and re-saves are stored losslessly instead of compounding JPEG compression artifacts each time the file is re-saved.

  3. 3

    Strip GPS/EXIF metadata before sharing a photo

    Re-encoding through canvas drops camera EXIF and GPS location tags, which is useful when sharing a photo publicly without embedded location data.

Summary

This tool converts JPG/JPEG images to PNG by decoding the file with createImageBitmap() and re-encoding it to lossless PNG via the Canvas 2D API (OffscreenCanvas.convertToBlob or HTMLCanvasElement.toBlob), at the source image's original pixel dimensions. All decoding and encoding happens in the browser using the File and Canvas APIs, so the image is never uploaded to a server. Because canvas re-encoding rebuilds the file from raw pixels, EXIF, IPTC, and ICC metadata are stripped in the output.

Category
Creator
Pricing
Free
Privacy
Browser-based
Signup
Not required

References

Privacy

Your data never leaves your browser unless explicitly stated. JPG to PNG Converter runs entirely client-side — no server upload, no logging, no tracking of your input.

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