Convert to PNG Image

PNG as the safe, lossless destination

When you are not sure what an image will go through next, PNG is the cautious choice. It compresses without discarding anything, so the file you save today is pixel-for-pixel what you get back tomorrow, after any number of re-saves. It handles full colour, supports smooth partial transparency through an alpha channel, and opens in every browser, design app, presentation tool and operating system in use today.

Convert to PNG Image takes JPG, JPEG, GIF, WEBP, JIFF, BMP and PNG uploads and writes each one as a .png file on our server. It is popular with designers collecting assets from mixed sources, teachers and students assembling slides, developers preparing interface graphics, and anyone whose upload form demands PNG.

What PNG does well, and where it struggles

Strengths

• Sharp text and lines. Screenshots, diagrams, charts, UI mock-ups and scanned line art keep perfectly crisp edges.
• Transparency. Logos, stickers and cut-outs can have soft, anti-aliased edges over any background.
• Repeated editing. No generation loss, however often you open and save.

Weakness

Photographs. Because PNG keeps every subtle variation in a photo, files get large, often several times bigger than a JPEG of the same scene. If your image is a photo and the destination does not specifically require PNG, a JPG or WEBP will usually be the smarter target.

What happens to each source

• JPG / JPEG: The PNG preserves the image exactly as it is now, including any existing JPEG artefacts. Nothing is restored, but nothing more is lost. File size usually rises.
• BMP: The usual outcome is a much smaller file with identical pixels, because PNG compresses losslessly where BMP usually does not compress at all.
• GIF: Still GIFs move into a container with no 256-colour ceiling for future edits. The colours already reduced in the GIF stay reduced.
• WEBP: A common reason to use this page. Many older tools and some portals still refuse WEBP; PNG is accepted almost everywhere and keeps any transparency.
• PNG: Useful when you only want to resize, add a DPI value or strip metadata while staying in PNG.

Configuration notes specific to PNG

The Configuration panel opens with Convert Format set to PNG.

The Quality slider (10% to 100%, default 75%) carries the hint "Higher % = Better Quality, Larger Size", which applies to lossy formats. For PNG the server turns the percentage into a lossless compression level instead. Appearance is identical at any setting; only the packing effort and therefore the file weight change slightly. The direction depends on which image library the server is running, so when every kilobyte counts, process once near each end of the slider and keep the smaller output.

Resize Unit is where real savings come from. Options are No Resize, Pixel, Percent, Inch, Centimeter and Millimeter. With Pixel, entering just a Width or just a Height keeps the aspect ratio. Percent and the print units should have both boxes filled.

DPI stores a resolution in the PNG, handy for print layouts and slide software that sizes images by DPI. When you resize in inches, centimeters or millimeters, the server multiplies by this value (96 if blank).

Converting images to PNG

1. Decide whether to resize; if so, choose a unit and fill in Width and Height.
2. Add images by dragging them onto Select Images or using Select File. Any image type can be selected and mixed.
3. Optional: click From URL to add images from the web, one address per line, then Process to queue them.
4. Run a single card with Process, or press Process Queue to convert everything with the same settings.
5. Each completed card shows the PNG weight, its change from the original, the new dimensions, any DPI and the PNG badge.
6. Click the thumbnail to inspect transparency and edges at a larger size, then Download.

Example situations

A WEBP that will not open

You saved an image from a website and your presentation software refuses it. Convert it here to PNG with No Resize; the picture and any transparency come through and the file now opens.

Slides that need crisp diagrams

A chart exported as JPEG shows smudges around labels. Converting it to PNG will not clean up the existing smudges, but if you re-export the chart from its source as BMP or PNG and then resize it here, it stays sharp in your slides.

Old BMP icons

Legacy toolbar icons stored as BMP become small, modern PNG files with the same pixels.

Sensible habits

• Use PNG for graphics, text and transparency; use JPG or WEBP for photographs.
• Resize photos before converting them to PNG if size matters at all.
• Check transparent images on the preview; the lightbox shows them over a dark backdrop so edges are easy to judge.
• Rename the downloads: the file name gets a random prefix, and images from URLs lose their name.

Mistakes to skip

• Converting a blurry JPEG to PNG to make it sharper. It will not change.
• Sending a full-resolution photo as PNG to a form with a small size limit.
• Expecting this page to remove backgrounds; it converts formats, it does not cut out subjects.
• Typing decimals in Width, Height or DPI; whole numbers only.

Limitations

• Uploads up to 10 MB per file; inputs JPG, JPEG, PNG, GIF, WEBP, JIFF and BMP.
• Animated GIFs are not a good input for PNG: the format holds one still picture here, and multi-frame files may fail or give an unexpected result.
• One configuration per queue run; if any file fails, the batch reports an error.
• Metadata is stripped by default and orientation tags are applied before saving.
• No crop, rotate, flip or zoom tools are part of this converter.

Processing location

Conversion is handled on our server by a server-side image library rather than in your browser. The PNG returns to your browser inside the response as Base64, which Copy Base64 lets you copy, and the server deletes its temporary file once the response is built.

Starting from a JPEG specifically? JPEG to PNG explains that case in more depth.

Frequently Asked Questions