Drop your images here
or click to browse — select multiple files at once
JPG · WebP · GIF · BMP · Converted entirely in your browser
How it works
- 1
Drop your images
Drag and drop multiple JPG, WebP, GIF, or BMP files onto the tool, or click to browse and select them.
- 2
Auto-convert to PNG
Each image is converted to lossless PNG instantly in your browser. No quality settings needed — PNG is always lossless.
- 3
Download
Download individual PNGs by hovering over them, or grab all images in one ZIP archive.
Why use this image converter?
100% private
Images never leave your device. Everything runs locally in the browser — no server upload, ever.
Instant, no sign-up
No account or email needed. Drop images and get PNGs in under a second.
Lossless output
PNG uses lossless compression — every pixel in the output is an exact copy of the decoded input image.
Batch conversion
Convert many images in one go. Drop as many files as you need, all processed simultaneously.
Multiple input formats
Accepts JPG, WebP, GIF, and BMP — all converted to PNG in one step.
Individual or ZIP download
Download a single PNG with a hover click, or grab everything as a named ZIP archive.
When would you convert JPG to PNG?
PNG and JPG serve different purposes. Knowing when to switch helps you keep the best possible image quality.
Edit images without further quality loss
Every time you re-save a JPG, it recompresses the image and loses more data. By converting to PNG first, you can edit and re-save as many times as you like with zero additional quality loss.
Add text or sharp graphics on top
JPG compression blurs sharp edges — when you overlay crisp text or line art on a JPG background, the compression artefacts become obvious. Converting to PNG first keeps edges clean.
Add transparency or cut out backgrounds
JPG cannot store transparent pixels. When you want to remove the background from a JPG image using an editing tool, convert to PNG first so transparency can be added correctly.
Screenshots and UI mockups
Screenshots often come from cameras or screen-capture tools that save as JPG. Converting to PNG ensures text and UI elements remain crisp when inserted into presentations or design documents.
High-quality print preparation
For banners, posters, or commercial printing where every pixel counts, storing the working copy as PNG prevents generational quality loss during edits. Convert back to JPG only when the final output requires it.
Scientific and technical imaging
Medical scans, microscopy, and technical diagrams benefit from lossless PNG storage. Even minor compression artefacts in JPG can misrepresent data in high-precision contexts.
How JPG-to-PNG conversion works under the hood
No servers, no uploads — here is exactly what happens when you convert an image in your browser.
- 01
Images are read locally
When you drop files onto the tool, the browser reads each image directly from disk using the File API. No data is sent over the network at any point — everything stays on your device.
- 02
Each image is decoded into pixels
The browser fully decodes the source file (JPG, WebP, GIF, or BMP) into a raw pixel buffer. For JPG files, this means decompressing the JPEG data and restoring the original RGB pixel values that the JPEG codec stored.
- 03
Pixels are drawn onto an HTML5 canvas
A hidden canvas element is created at the exact pixel dimensions of the original image. The decoded pixel data is painted onto the canvas — no resizing or resampling occurs.
- 04
The canvas is exported as PNG
The browser's Canvas API encodes the canvas contents as a lossless PNG image. The PNG encoder compresses pixel data using the DEFLATE algorithm — lossless, meaning every pixel value is preserved exactly.
- 05
The result is available instantly
The encoded PNG is returned as a data URL in memory. For single files it is immediately downloadable; for multiple files, JSZip bundles them into a ZIP archive in the browser before download.
JPG vs PNG — understanding the difference
Choosing the right format for the job is key to balancing file size and image quality. Here is how JPG and PNG compare.
| JPG | PNG | |
|---|---|---|
| Compression | Lossy — some detail discarded | Lossless — pixel-perfect |
| Transparency | Not supported | Supported (alpha channel) |
| File size | Smaller for photos (50–80%) | Large for photos, small for UI |
| Re-saving quality | Degrades on every save | No quality loss on re-save |
| Best for | Photographs, web images, sharing | Screenshots, logos, diagrams, UI |
| Browser support | Universal | Universal |
Tips for working with JPG-to-PNG conversions
Get the most out of the conversion with these practical tips.
Convert once, edit in PNG
Convert your JPG to PNG before making any edits. Edit as much as you need, then export to JPG at the end. This way you avoid accumulating compression artefacts across multiple edit-and-save cycles.
Expect larger files — plan storage accordingly
PNG files are typically 2–5× larger than equivalent JPG files. If you are working with a batch of photos, make sure you have sufficient storage before converting large collections.
Conversion cannot recover lost JPG quality
Converting JPG to PNG gives you lossless storage from that moment on, but the subtle detail lost by the original JPEG encoding cannot be recovered. The PNG will be a perfect copy of the decoded JPG, not the original pre-compression image.
Use PNG for any image that needs editing
Any time you plan to use an image as a layer or background, add transparency, or apply masking in a design tool, PNG is the right choice. Keep JPG only for finished images you are delivering or publishing.