JPG Converter to PNG — Free, No Upload

Convert your JPG images to PNG format with transparency support. Change JPEG to PNG without uploading — 100% private, free, and unlimited.

Click to Select JPG Images

Or drag and drop files here

How to Convert JPG to PNG

1

Select JPG Images

Click the upload area or drag and drop your JPG files. Select one or multiple images at once.

2

Preview Files

Review your selected JPG files. PNG output preserves full quality with lossless compression.

3

Download PNG

Click Convert and download your PNG files. Everything happens in your browser — no server upload needed.

When Do You Need to Convert JPG to PNG?

Converting JPG to PNG is essential when you need transparency support or lossless image quality. Web designers convert JPG logos to PNG to place them on different colored backgrounds without a visible white box. Digital artists change JPEG images to PNG before editing to prevent further quality degradation from repeated saves.

PNG format is required for app icons, website favicons, and UI elements that need transparent backgrounds. E-commerce sellers convert product photos to PNG when they need to overlay them on custom backgrounds. Document creators use PNG when they need pixel-perfect screenshots without compression artifacts.

With OneWeeb, you can convert JPG to PNG without uploading your images to any server. Your photos, designs, and documents stay on your device throughout the entire conversion process.

JPG vs PNG — When to Use Which?

FeatureJPG (JPEG)PNG
CompressionLossyLossless
File size60-80% smallerLarger
Transparency❌ No transparency✅ Supports alpha
Best forPhotos, web imagesLogos, screenshots, graphics
Quality after editingDegrades each saveNo degradation
Color depth16.7 million colors16.7M + alpha channel

OneWeeb vs Other JPG to PNG Converters

FeatureOneWeebOthers
Uploads files to server❌ No — 100% local✅ Yes
Requires signup❌ No✅ Often required
Daily limits❌ Unlimited✅ 3–10 per day
Works offline✅ Yes❌ No
Batch conversion✅ Yes, free💰 Often paid
Custom background color✅ Yes⚠️ Rarely
Quality control✅ Adjustable slider⚠️ Limited
Cost✅ Free forever💰 Free tier + paid

Why Use OneWeeb to Convert JPG to PNG?

No Upload Required

Your JPG files stay on your device. Nothing is sent to any server.

Batch Conversion

Convert multiple JPG files to PNG at once. No limits on file count.

Lossless Output

PNG uses lossless compression. No quality is lost during conversion.

Free & Unlimited

No daily limits, no signup, no watermarks. Free forever.

Frequently Asked Questions

How do I convert JPG to PNG?
Select your JPG file in OneWeeb's converter and click Convert. The tool converts JPG to PNG entirely in your browser — no upload to any server. Download your PNG file instantly.
Does converting JPG to PNG improve quality?
No. Converting JPG to PNG preserves the existing quality but does not restore detail lost during original JPG compression. However, PNG prevents any further quality loss from future edits and saves.
Will my PNG file be larger than the JPG?
Yes, typically 2-5x larger. PNG uses lossless compression which preserves every pixel but results in larger files. This is the trade-off for perfect quality and transparency support.
Does this tool upload my files?
No. OneWeeb converts JPG to PNG entirely in your browser using the Canvas API. Your files never leave your device. You can verify by turning off your internet — the conversion still works.
Can I add transparency after converting to PNG?
The conversion itself does not add transparency — it converts the format. To make parts of the image transparent, you would need an image editor like GIMP or Photoshop after conversion.
Can I convert multiple JPG files at once?
Yes. Select multiple JPG files and convert them all to PNG in one batch. Each converted file can be downloaded individually.

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