Is this converter free?

Yes. All processing runs in your browser at no cost.

Are files uploaded to a server?

No. Files never leave your device.

Does it work offline?

Yes. After the first visit the app works fully offline as a PWA.

Can I convert JPEG to PNG on iPhone?

Yes. The converter works in Safari on iPhone and iPad.

Does it work on Android?

Yes. Chrome on Android is fully supported.

Is registration required?

No account or registration needed.

Is there a file size limit?

The limit depends on your browser and device memory. Files up to 100 MB are generally supported.

What browsers are supported?

Chrome 80+, Firefox 113+, Safari 16.4+, and Edge 80+ are supported.

Can I convert multiple images into one PDF?

Yes. Select multiple images and they will be combined into a single PDF, one image per page.

What open-source libraries are used?

PDF.js (by Mozilla) is used to render PDFs. All other processing uses the native Canvas API.

JPEG to PNG Converter (Offline & Free)

How to Convert JPEG to PNG

Select your JPEG image file.
The output format PNG is pre-selected.
Adjust quality if needed (JPEG/WebP: 0.1–1.0).
Click Convert.
Click Download to save the result.

About JPEG and PNG

About JPEG

JPEG (Joint Photographic Experts Group) is the most common format for photographs. It uses lossy compression to reduce file size while maintaining acceptable visual quality.

Pros: Small file size, universal support, ideal for photos.

Cons: Lossy compression reduces quality, no transparency support.

Best for: Photos, social media images, web backgrounds.

About PNG

PNG (Portable Network Graphics) is a raster image format that uses lossless compression. It supports transparency (alpha channel), making it ideal for graphics, logos, and screenshots.

Pros: Lossless quality, transparency support, widely supported.

Cons: Larger file sizes than JPEG for photographs.

Best for: Logos, icons, screenshots, graphics with transparency.

Format Comparison

Format	Transparency	Compression	Best Use
PDF	No	Various	Documents
PNG	Yes	Lossless	Graphics
JPEG	No	Lossy	Photos
WebP	Yes	Lossy/Lossless	Modern Web

Privacy & Security

This tool processes files entirely within your browser using the Canvas API and PDF.js (Mozilla). No data is sent to any server. You can verify this by using the browser's developer tools to inspect network activity.

Supported browsers: Chrome 80+, Firefox 113+, Safari 16.4+, Edge 80+.

Frequently Asked Questions

Is this converter free?: Yes. All processing runs in your browser at no cost.
Are files uploaded to a server?: No. Files never leave your device.
Does it work offline?: Yes. After the first visit the app works fully offline as a PWA.
Can I convert JPEG to PNG on iPhone?: Yes. The converter works in Safari on iPhone and iPad (iOS 16.4+).
Does it work on Android?: Yes. Chrome on Android is fully supported.
Is registration required?: No account or registration needed.
Is there a file size limit?: The limit depends on your browser and device memory. Files up to 100 MB are generally supported.
What browsers are supported?: Chrome 80+, Firefox 113+, Safari 16.4+, and Edge 80+.
Can I convert multiple images into one PDF?: Yes. Select multiple images and they will be combined into a single PDF, one image per page.
What open-source libraries are used?: PDF.js (by Mozilla) is used to render PDFs. All other processing uses the native Canvas API.