How does Intel HEX checksum verification work?

Every line starts with a colon (:). The sum of all byte values on the line (record length, address, record type, data, and checksum) modulo 256 must equal zero.

What is the difference between Intel HEX and Motorola S-Record?

Intel HEX uses 16-bit base addresses extended via type 04 records, whereas Motorola S-Record directly designates 16-bit (S1), 24-bit (S2), or 32-bit (S3) addresses within the record header.

Intel HEX & Motorola S-Record Inspector

Analyze embedded firmware binaries. Verify checksums across every record line, reconstruct memory layout ranges, and export clean binary data without leaving your browser.

HEX / SREC TEXT INPUT 0 lines

MEMORY MAP & BLOCK SEGMENTS 0 segments

Inspect a firmware file to view memory address segments.

Frequently Asked Questions

What happens if a record checksum is corrupt?

The inspector flags the exact line number in red with the expected vs calculated checksum byte so you can diagnose transfer corruption or bit flips before flashing.

Can this tool export a raw binary image?

Yes. The "Download .bin" button constructs a contiguous binary array from the parsed memory segments and initiates a direct browser download.