OSM opening_hours converter

OpenStreetMap's opening_hours tag has a strict grammar — Mo-Fr 09:00-17:00; Sa 10:00-14:00; Su off. Paste what the shop's website actually says and get the tag value, ready to drop into iD or JOSM.

Opening hours, as a human would write them

Result

…

Syntax reminders

Day codes are two letters: Mo Tu We Th Fr Sa Su; ranges use -.
Rules are separated by ; — later rules override earlier ones.
Times are 24-hour HH:MM, zero-padded. 24/7 is its own literal.
A closed day is Su off, not an omitted day.
Split shifts are comma-separated inside one rule: Mo 11:00-14:00,17:00-22:00.

Always eyeball the result against the source before you upload — bad hours data is worse than no hours data.

Do this at scale

This page runs on the public OpenHours API. The same call handles bulk input — up to 500 hours strings per request — and returns all three formats at once. Free tier is 100 requests/day with no signup.

curl -X POST https://smeltworks.com/openhours/v1/parse \
  -H 'content-type: application/json' \
  -d '{"text":"Mon-Fri 9am-5pm, Sat 10-2, closed Sun"}'

Starter — $9/mo, 10k req Growth — $29/mo, 100k req