Pick the bands and read the resistance: 4-, 5- or 6-band resistors, with significant-digit, multiplier, tolerance and (6-band) temperature-coefficient colors, showing the value, its ±tolerance range and the tempco in ppm/K. Or switch to reverse — type a resistance and a tolerance and get the color bands back, when the value fits the scheme's significant digits. A drawn resistor previews every band as you go. Runs entirely in your browser.
Privacy ledger
Data acquired
None.
Libraries used
Lit 3 — bundled into the tool file itself.
Data stored
None.
Data transmitted
None.
Use it on your own page
Download the tool as a single self-contained HTML file: readable source with the Lit library included, zero network requests — it works opened straight from your disk, and you can customize everything.