Convert BMP to PNG
Convert bulky uncompressed BMP bitmaps into compact, lossless PNG files. Everything is processed locally in your browser.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
From raw pixels to lossless compression
BMP stores every pixel uncompressed, which is why files from old scanners, screenshots tools and legacy Windows software are so absurdly large. PNG stores the identical pixels — mathematically identical, not “visually close” — at a fraction of the size, because its lossless compression squeezes out redundancy without touching the image.
Archive-safe by design
Because both formats are lossless, BMP to PNG is the rare conversion with no trade-off to weigh: nothing degrades, ever, no matter how often the PNG is re-saved. That makes it ideal for digitized documents, diagrams and archival scans. For photographic BMPs where a little loss is acceptable, BMP to JPG shrinks them far further.
Whole folders convert in one drop, entirely in your browser.
Frequently asked questions
- Which formats are supported?
- You can convert to and from JPG, PNG, WebP, AVIF and BMP, and convert from HEIC/HEIF (iPhone photos). Browsers cannot create HEIC files, so HEIC is input-only. Output formats your browser cannot encode are detected and disabled automatically.
- Can I convert HEIC to JPG?
- Yes. Drop in a HEIC photo from an iPhone and choose JPG (or PNG/WebP). The HEIC file is decoded locally in your browser with a bundled decoder — it is never uploaded anywhere.
- Is transparency preserved?
- Yes, when converting to a format that supports an alpha channel (PNG, WebP, AVIF). For formats without transparency (JPG, BMP), you can pick a background color for transparent areas.
- Is my image uploaded?
- No. Conversion runs entirely in your browser — your images never touch a server.
- What is AVIF and should I use it?
- AVIF produces the smallest high-quality files. Encoding support varies by browser, so PixelVault enables it only when your browser can create AVIF files.
- Can I convert many images at once?
- Yes. Batch-convert a whole folder of images and export them together as a ZIP.