PNG - JPG Conversion & Reverse Conversion
Convert images from PNG to JPG, or JPG to PNG
Features
Two-way PNG/JPG conversion
Convert between PNG and JPG in both directions
Fill transparency with a white background
Fill transparent areas with white when converting to JPG
Supports JPEG quality settings
Change the compression rate to balance file size and quality
Batch convert multiple files
Convert the selected images one after another and save them individually
How to Use
Choose the output format
Specify PNG → JPG or JPG → PNG in the selection field
Add image files
Choose and upload images in a supported format; multiple selection is possible
Adjust the JPEG quality
When outputting JPG, set the quality from 10 to 100% with the slider
Convert and save the result
Convert with the run button and save with the download button
Use Cases
Reducing photo file size
Convert PNG to JPG to keep the file size down and lighten transfers
Fixing the background of transparent images
Turn a transparent PNG into a white-background JPG to post on social media or in documents
Format conversion for print submission
Quickly unify images to the format required by the posting destination or submission guidelines
Converting to PNG for re-editing
Convert JPG to PNG to secure a re-saving environment without quality loss
Basic Knowledge
Choosing Between PNG and JPG
JPG compresses photos and images with many colors down to smaller file sizes, while PNG preserves sharp images like logos, diagrams, and text without quality loss. The basic rule is to use JPG for photos and PNG for screenshots and diagrams.
Why Transparency Becomes White When Converting to JPG
JPG has no mechanism to represent transparency, so transparent areas in PNG must be filled with some color during conversion. If the image is intended for use on a white background page, filling with white is natural. However, if you want to preserve transparency, keep the file as PNG.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
converting the image is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the converted image and input suggestions are not stored on the server.
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Updates
- update #192
Fixed PNG-JPG conversion to keep selected images when output format changes
If unsupported images remain, we will display a message on screen to notify you.
- update #40
Add batch ZIP saving and 50MB limit to PNG-JPG conversion
Now supports automatic detection of mixed uploads, size display before and after conversion, and automatic sync after execution.
Featured Tools
RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
Use in streaming and videos
Use various tools such as lottery draws and raffles in live streams and videos.
Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.