Terms of use
Last updated 2026-09-30.
Free online tools
The calculators, checks and flashers under /tools are provided as is, free of charge, with no warranty of any kind — including no warranty that they are fit for a particular purpose. Flashing firmware, mass-erasing a chip, or changing option bytes can overwrite or damage what is already on a device; you are responsible for choosing the right firmware, chip, and settings for your board before you use a flasher. To the extent the law allows, we are not liable for any damage, data loss, or bricked device that results from using these tools. A calculator's result (component values, thresholds, resistor codes and the like) is guidance, not a guarantee — verify it against the part's own datasheet before you build or order anything from it. If you want the work done for you instead, our engineers can help — see contact.