A free-for-personal-use tool that converts your .olm file and uploads it through Gmail's official API, so twenty years of mail lands filed under the years it actually happened — not under the afternoon you uploaded it.
OLM is a roach motel. Only Outlook for Mac can read its own archive format; Microsoft ships no converter, and the paid-converter market is largely SEO-bait shovelware.
Every IMAP upload mangles dates. Drag your archive into Gmail through Thunderbird or Outlook and every message arrives stamped today — decades of history filed under one afternoon. Gmail's own API has a switch that files each message under its true date. Mail clients don't use it. This tool does.
Your mail stays yours. Everything runs on your own computer. Your mail goes nowhere except to your own Gmail via Google's official API — no third-party servers, no telemetry, no accounts with anyone but Google.
Point it at your .olm and see what's inside — folders, counts, attachments — before anything happens.
Outlook's internal format becomes standard mailbox files on your disk. Read-only on the .olm; nothing uploaded yet.
A guided four-minute, one-time Google setup — your own free Cloud project, so only you ever hold your credentials.
True dates, one label per folder, automatic retries, resumable anytime. Failures are named in a report, never silent.
Personal use is free — your own mailboxes, your family's, no strings. Commercial use — IT providers, consultants, and businesses migrating client or employee mail — requires a paid license, which keeps the personal version free. Commercial licensing →