Tools
Small helpers for the darkroom (and the sun).
Cyanotype Negative
Turn a photo into a B&W digital negative for cyanotype contact prints, with a live Prussian blue preview.
Open tool →Negative Inverter
Turn camera scans of B&W or colour negatives into positives, a whole roll at once, and download them as a ZIP.
Open tool →Darkroom Chemistry
Dilution for your tank, temperature-corrected times, fixer clip test and a bath usage tracker for home developing.
Open tool →Exposure Calculator
Sunny 16 by light and ISO, equivalent aperture/shutter pairs with ND filters, and reciprocity correction for long exposures.
Open tool →Development Timer
Step-by-step timer for developing at home: temperature-corrected developer time, agitation and drain beeps, and the screen stays on.
Open tool →Everything runs in your browser — your photos never leave your device.