Image Conversion

Convert BMP to PNG — Free Online Converter

Convert BMP bitmap files to PNG format free. Lossless conversion with massive size reduction. Works on any device — no software needed.

3.719 αρχεία έχουν μετατραπεί

ή σύρετε και αφήστε οπουδήποτε στη σελίδα

Υποστηρίζει BMP

Μέγιστο μέγεθος αρχείου: 2GB (Pro) · 100MB Δωρεάν

5 free conversions/day — no account needed

ή εγγραφείτε δωρεάν →

Κρυπτογραφημένο κατά τη μεταφοράΤα αρχεία διαγράφονται σε 2 ώρεςΧωρίς εγγραφή

ή εισαγωγή από

Conversion settings — add a file to adjust

Quality

190100

Compression effort (1-100)

Width (px)

Leave empty to keep original

Height (px)

Leave empty to keep original

Resize Mode

Interlaced

Progressive loading for PNG

Palette quantization (smaller file, slight quality loss)

Quantize to a palette (up to 256 colors). 60-70% size reduction on photographic PNGs; may band gradients.

Strip Metadata

Remove EXIF data, GPS, camera info

Μάθετε περισσότερα για τη μετατροπή BMP σε PNG

BMP is a container format supporting multiple pixel encodings: 1-bit monochrome, 4-bit and 8-bit indexed color (with palette), 16-bit high color, 24-bit true color, and 32-bit RGBA. Our converter handles all BMP variants including OS/2 BMP, Windows BITMAPINFOHEADER, BITMAPV4HEADER, and BITMAPV5HEADER structures. RLE-compressed BMP files (RLE4 and RLE8) are decompressed and re-encoded with PNG's more efficient DEFLATE algorithm.

The Sharp library decodes the BMP pixel array, applies any necessary row-padding correction (BMP rows are padded to 4-byte boundaries), and encodes the result as PNG with optimal compression level 9. For 32-bit BMP files with an alpha channel, the transparency information is preserved in the PNG alpha channel. Output PNG files use adaptive filtering and maximum DEFLATE compression for the smallest possible file size. The conversion is mathematically lossless — every pixel value in the output matches the input exactly.

Συχνές ερωτήσεις

No. Both BMP and PNG are lossless formats that store exact pixel values. Our converter transfers pixel data without modification — the output PNG is visually and mathematically identical to the source BMP.

Typically 50–80% smaller. A 6 MB BMP screenshot usually becomes 1–2 MB as PNG. The exact reduction depends on image complexity — screenshots with large solid-color areas compress exceptionally well.

Yes. 32-bit BMP files with an alpha channel are converted to 32-bit PNG with full transparency preserved. Most BMP files are 24-bit without transparency — in that case the PNG output will also be opaque.

BMP stores raw, uncompressed pixel data — every pixel occupies 3 bytes (24-bit) regardless of neighboring pixels. PNG uses DEFLATE compression to eliminate redundancy, encoding identical pixel runs and gradients efficiently.

Absolutely. Scanners outputting BMP are using an outdated default. Converting to PNG saves 50–80% storage with no quality penalty. If your scanner supports direct PNG output, switch to that setting instead.

macOS can open BMP through Preview with limited support. iOS and Android have minimal native BMP support — most gallery apps skip BMP files entirely. Converting to PNG ensures your images work everywhere.

Yes. Free users can queue up to 5 files per session, while Pro users get unlimited batch conversion with parallel processing for entire folders of legacy bitmap images.

For text, screenshots, diagrams, or graphics with sharp edges, PNG is the right choice — it is lossless. For photographs that will only be viewed (not edited), JPG produces smaller files but introduces minor lossy compression. For archival purposes, PNG is always safer.

Device	BMP	PNG
Windows	Native	Native
macOS	Partial	Native
iOS	No	Native
Android	No	Native
Linux	Partial	Native
ChromeOS	No	Native

Speed	Instant.
Output size	Large reduction — BMP is uncompressed (measured 5.9 MB → 0.84 MB, ~86% smaller).
Quality	Lossless; PNG keeps every pixel while shedding BMP's bulk.
Engine	Sharp (libvips), server-side.

Χαρακτηριστικό	BMP	PNG
Πλήρες όνομα	Bitmap Image	Portable Network Graphics
Επέκταση	.bmp	.png
Ιδανικό για	Uncompressed	Lossless quality

Convert BMP to PNG — Free Online Converter

Σχετικά με τη μετατροπή BMP σε PNG

Γιατί να μετατρέψετε BMP σε PNG;

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Πώς λειτουργεί

Ποιότητα & απόδοση

Συμβατότητα συσκευών

BMP to PNG: real-world performance

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