Is this PNG to BMP converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple PNG files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

Will the image quality change after conversion?

It depends on the formats involved. Converting to a lossless format like PNG preserves every pixel exactly. Converting to a lossy format like JPEG or WebP applies compression — we default to 85% quality, which looks identical to the original for almost all images. You won't notice a difference unless you zoom in pixel-by-pixel.

Do you support batch image conversion?

Yes — drop multiple images at once and they all convert in parallel. Free accounts handle up to 5 at a time; Pro is unlimited. Download everything as a single ZIP when you're done.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

PNG to BMP Converter — Free, Online, No Upload

How to convert PNG to BMP online

1
Drop your PNG file
Drag and drop your Portable Network Graphics file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Portable Network Graphics → Bitmap Image File entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your BMP
Your Bitmap Image File file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

PNG vs BMP: format overview

PNG

Portable Network Graphics

PNG Development Group (Thomas Boutell) · 1996

Compression: lossless
Color depth: 16-bit
Transparency: Yes

✓ Lossless compression — pixel-perfect quality
✓ Full alpha transparency (8-bit alpha channel)
✗ Large file sizes for photos

BMP

Bitmap Image File

Microsoft · 1987

Compression: none
Transparency: No

✓ No compression — original pixel data preserved
✓ Universal Windows support

PNG magic bytes: 89 50 4E 47 0D 0A 1A 0A

BMP magic bytes: 42 4D

Why convert PNG to BMP?

PNG to BMP conversion is a niche but real requirement in specific technical contexts. Legacy Windows desktop applications, certain industrial control software, older versions of Microsoft Office running on enterprise systems, and some embedded systems programming tools require BMP as the input format because they predate widespread PNG support. Game development for older platforms using tools like RPG Maker 2000 or Game Maker 6 also specified BMP for sprite and tileset assets.

BMP guarantees compatibility with anything built on the Windows GDI graphics layer, since BMP is the native Windows raster format. When a piece of software throws an unsupported format error with a PNG but not with a BMP, converting is the fastest path forward. Forensic and archival workflows sometimes specify BMP to ensure raw, uncompressed pixel data with no algorithmic transformation applied to the image content.

Converting PNG to BMP expands the file size significantly because BMP stores uncompressed pixel data. A 500 kilobyte PNG might become a 5 megabyte BMP, so be prepared for larger files. The conversion is lossless: every pixel value is preserved exactly, and any color precision in the original PNG is maintained in the BMP. If the PNG has a transparent background, the alpha channel will be filled with a solid color, typically white or black, since standard BMP does not support transparency. The resulting BMP file opens in Paint, Windows Photo Viewer, and any Windows application without additional software.

Quality & file size: PNG to BMP

Typical file sizes: PNG 8–25 MB → BMP 35–40 MB.

Both PNG and BMP use lossy compression. We transcode at high quality settings (equivalent to BMP's recommended web quality) to minimize generational loss.

Color depth: PNG supports 16-bit, BMP supports standard color.

Transparency: PNG supports transparency. BMP does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your PNG files are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.