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UF2 HEX
Free online converter

Convert UF2 to HEX

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UF2 to HEX converterFREE
Drop a .UF2 file here
or pick one - we convert it to .HEX and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Nov 2026

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How to convert UF2 to HEX

  1. Add your .UF2 file - drop it in the box above or click to browse.
  2. Convert it to .HEX in a few seconds.
  3. Download your new .HEX file.

What to expect

  • There is no one-command UF2-to-HEX; the raw .bin in the middle loses the address, so you must re-supply the flash base offset in the objcopy/srec step.
  • Get the offset wrong and the .hex will place code at the wrong memory address, which can brick or fail to boot the device.
  • Some objcopy versions had regressions converting binary to ihex; SRecord is the recommended fallback for exact offsets.

Frequently asked questions

Why two steps?
uf2conv.py only outputs raw .bin and C arrays, not Intel HEX. You convert UF2 to .bin, then use objcopy or SRecord to make the .hex.
What offset do I use?
Use the flash base address the firmware is meant to run at (often the app region past the bootloader). Pass it via --change-addresses or srec -offset.
Where do I get objcopy?
It ships with GNU binutils; for ARM MCUs use the arm-none-eabi-objcopy from the GNU Arm Embedded toolchain.
What if objcopy gives wrong addresses?
Use SRecord's srec_cat with an explicit -offset, which handles binary-to-Intel-HEX address placement reliably.
Learn about the formats: .UF2 · .HEX