CID to BMP Converter

Export CID font characters as uncompressed BMP bitmap images

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Exact Pixel Fidelity

BMP records every pixel without compression, so CJK glyph strokes, serifs, and details are reproduced exactly as rendered.

Universal Viewing

BMP opens on every platform — Windows, macOS, Linux, mobile. Share your CID font character renders with anyone, anywhere.

Secure Conversion

Your CID font uploads are deleted immediately after processing. BMP outputs are purged within 24 hours to protect your data.

How to convert CID to BMP

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose bmp or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your bmp file right afterwards

About formats

CID (Character Identifier) is a font architecture developed by Adobe Systems and specified in June 1993 to address the challenges of fonts containing very large glyph sets, particularly for CJK (Chinese, Japanese, Korean) scripts. Traditional PostScript fonts identify glyphs by name, which becomes impractical when a font contains tens of thousands of characters — a typical Japanese font may include over 20,000 glyphs. CID-keyed fonts replace glyph names with numeric identifiers organized by a character collection and ordering (such as Adobe-Japan1 or Adobe-GB1), dramatically reducing overhead for glyph access and subsetting. The architecture defines three PostScript font types: Type 9 (CID-keyed Type 1 outlines), Type 10 (CID-keyed Type 3), and Type 11 (CID-keyed Type 42/TrueType). A primary advantage is efficient handling of massive character sets — the numeric CID approach eliminates the memory and processing cost of maintaining thousands of glyph name strings. CID fonts also support sophisticated CMap resources that map encoding values to CIDs, enabling a single font to serve multiple encoding schemes (Unicode, Shift-JIS, Big5) without duplicating glyph data. The architecture integrates well with PDF subsetting, allowing documents to embed only the glyphs actually used. CID-keyed technology laid the foundation for CJK support in both OpenType and modern PDF workflows, and remains active in print production and document processing systems worldwide.
Developer: Adobe Systems
Initial release: June 11, 1993
BMP (Bitmap) is a raster image file format developed by Microsoft for the Windows operating system, introduced with Windows 3.0 in 1990. The format stores pixel data in a straightforward structure: a file header specifying dimensions, color depth, and compression method, followed by an optional color palette and then the raw pixel array. BMP supports color depths from 1-bit monochrome through 4-bit and 8-bit indexed color to 16-bit, 24-bit true color, and 32-bit with alpha channel. Most BMP files store pixels uncompressed (BI_RGB), though optional RLE compression is available for 4-bit and 8-bit modes. Pixels are arranged in bottom-up row order by default, with each row padded to a 4-byte boundary. One advantage is absolute simplicity — the format has no complex encoding, filtering, or compression layers, making BMP files trivial to read and write programmatically in any language. This simplicity also means BMP images render with zero decoding overhead, useful in scenarios where decompression latency matters. The format's deep Windows integration is another strength: BMP is the native bitmap format for Windows GDI, clipboard operations, and device-independent bitmap (DIB) handling, ensuring first-class support across the entire Windows ecosystem. While BMP's lack of compression produces large files unsuitable for web use or storage-constrained environments, it remains widely used as an intermediate format in image processing, as a clipboard exchange format, and in embedded systems where decoding simplicity outweighs file size.
Developer: Microsoft
Initial release: 1990

Frequently Asked Questions

Why convert CID to BMP?

BMP stores pixel data without any compression, guaranteeing a faithful representation of your CID font glyphs — perfect for detailed visual inspection.

How do I open a BMP file?

Windows Paint, Photos, GIMP, IrfanView, and virtually every image viewer on any OS open BMP files without additional software.

Are BMP files large?

Yes — BMP is uncompressed, so files are larger than PNG or JPG. The tradeoff is zero compression artifacts and exact pixel fidelity.

Can I batch convert multiple CID fonts?

Convertio supports batch uploads — process several CID fonts at once and receive individual BMP outputs for each font.

Is this free on Convertio?

Absolutely. CID to BMP conversion runs at no charge — upload your fonts and download the bitmaps without any fees.

CID to BMP Quality Rating

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