Transparency becomes white. Size can grow.
JPG · 90% · original dimensions
9,130 B → 20,741 B
Original LM Tools test artwork, not a photograph. Conversion is not always compression. Check the white corners and unchanged dimensions.
01Add your images02Make them yours03Download the batch
Your images
Drop your images here
JPG, PNG or WebP · up to 20 files
NO FILES YET15 MB / file · 60 MB / batch
A little less file chaos.
Add a few images to see their size, preview your changes and download the result.
Your recipe
Quick setup
Saved settingsOn this device
Save a reusable recipe for this tool. Files and results are never saved. Names, text watermarks and PDF page numbers may be included; avoid sensitive text. How saved settings are stored (new tab)
Your original files stay untouched.
READY WHEN YOU ARE
Your files are ready.
Guide & FAQ
How to use · Batch PNG to JPG
Prepare JPG copies for a form, listing or email. Start at 90% quality with the original dimensions. Check fine text and white edges before saving.
Back to workspace ↑- 01
Add your images
Choose up to 20 JPG, PNG or WebP files. Keep the originals; the tool creates new JPG copies.
- 02
Check the conversion
JPG at 90% quality is selected to start. Dimensions stay unchanged unless you choose resizing, cropping or rotation. Transparent areas become white.
- 03
Review and download
Compare the results with the originals. Save one file directly or package several as a ZIP. Conversion can increase file size.
EXAMPLE · NOT YOUR FILES
A simple example
A transparent image becomes a JPG on white paper, with no crop or upscaling. The tested example below uses original LM Tools artwork and actual browser output.
Transparent PNG+JPG · 90% · edge 0
Same dimensions · white background · new fileTRY THE ACTUAL TEST FILES
Inspect the files. Repeat the test.
Original synthetic charts are not user documents or photographs. Real interface captures and licensed photos are labeled separately. Browser encoding can vary. Grain charts use KiB; the photograph uses KB. Match the unit shown in each example.
A real interface screenshot: check the small text.
JPG · 90% quality · original dimensions
Load original previewLoads on demand to keep the page lighter
319,327 B → 75,928 B
Captured from LM Tools’s actual local homepage and saved as PNG for this test; the initial browser capture was JPEG. It contains no user files. Compare small text and fine borders; PNG may remain the better choice for screenshots.
Adds to the current queue without replacing files. Applying settings clears older results; originals stay untouched.
PRACTICAL FILE GUIDES
Know what changes. Get it right.
Original examples, clear steps and honest limits. Download the files and repeat the checks.
01 / IMAGE
Prepare a batch of images for delivery
Turn mixed images into consistently named JPGs, limit the longest edge and download one ZIP. A complete browser-based hand-off workflow with editable settings.
Read the illustrated guide (new tab) 02 / IMAGEConvert PNG to JPG with a white background
Keep the right dimensions, understand transparency and check text edges before saving a JPG. A practical guide with original before-and-after files.
Read the illustrated guide (new tab)Before you start
- Input and output: JPG, PNG and WebP. HEIC, AVIF and animated inputs are not supported.
- Up to 20 images; 15 MB each, 60 MB total and 24 megapixels per image.
- A single output format applies to all files. PNG ignores quality and target-size controls.
- Conversion re-encodes the image and may remove EXIF or other metadata.
A few useful answers
Which format should I choose?
JPG is useful for ordinary photos without transparency. PNG supports transparency without a quality slider. WebP supports transparency and a quality setting for lighter web images. Check that the destination accepts your chosen format.
Will the pixel dimensions change?
Not with a maximum edge of 0 and no crop or rotation. The converter starts at edge 0. A maximum edge, crop or rotation setting can change dimensions.
Is converting to JPG reversible?
The original file stays unchanged. The new JPG uses lossy encoding and a white transparency background; converting that JPG back cannot restore lost detail or transparency.
Can I convert iPhone HEIC files?
Not in this version. Export them as JPG, PNG or WebP first. This tool also does not preserve animations.