Open an OLM File. Browse It, Then Convert It.
Handed an .olm archive from Outlook for Mac and nothing that will open it? OLM Converter reads the mail, contacts, calendar, notes, and tasks inside, and turns them into open formats your apps already understand — MBOX, EML, PDF, CSV, HTML, ICS, and VCF. Open it and browse the whole archive for free; convert when you're ready.
100% offline · runs entirely on-device · no account · original .olm never modified
An .olm file is the archive that Outlook for Mac exports — a single container that quietly packs an entire mailbox into one file: every folder of mail with its attachments, plus contacts, calendar events, notes, and tasks. The trouble starts the moment you try to open it somewhere else. Apple Mail won't import it, the Files app just shows an icon, and unless you happen to have that exact program installed, an .olm is effectively a sealed box. OLM Converter from Rush Tools is built to open that box. It works as both an OLM viewer and a converter, reading the archive directly on your iPhone, iPad, or Mac, letting you browse everything inside, and turning the contents into open, portable formats you can actually use — without any desktop suite, any subscription to a mail program, or any upload.
Open an .olm and you can read your messages with their attachments, page through contacts and calendar events, and look over notes and tasks — the whole archive, laid out so you can confirm it's the right one and find what you need. When you're ready to take that mail elsewhere, the app converts it into the format that fits where it's going. Choose a single MBOX mailbox to drop straight into Apple Mail or Thunderbird, a ZIP of MBOX files that keeps every folder as its own mailbox with the tree preserved, or a ZIP of individual EML messages with the folder hierarchy intact. You can also produce print-ready PDFs of messages, a CSV table of message metadata for a spreadsheet, a browsable offline HTML archive with its own index page, ICS files for calendar events, and VCF cards for your contacts.
Everything happens on your device. Your archive is never uploaded to a server, copied to the cloud, or sent through any account — there is nothing to sign into and nothing phoning home, which matters when an .olm holds years of personal or work correspondence. The original file is only ever read from; the app writes each conversion into a separate file, so your source archive is left exactly as it was. Attachments can be saved or shared on their own, so a document buried inside an old email becomes a normal file again. Because the output is plain, standard formats, you stay in control of where your mail ends up rather than being locked into one program.
A few honest points so you know exactly what this is. OLM Converter does not export to PST and it does not read .pst files — if you need your mail in another app, the path is to convert to MBOX or EML (or PDF and CSV) and import that yourself, which the common mail apps all accept. It also does not connect to or sign into any account; it produces clean files that you then import on your own terms. Opening an archive and browsing or previewing what's inside is free; converting, exporting, and saving attachments are unlocked with a weekly or annual plan, or a one-time Lifetime purchase. No account, on any of it.
One archive, every format you need.
Outlook for Mac keeps your mail, contacts, and calendar in a single .olm archive. Open it to browse, then convert what you need into a format your other apps actually read — everything on your device.
OLM → MBOX
One mailbox file that imports straight into Apple Mail or Thunderbird.
OLM → MBOX (ZIP)
One .mbox per folder with the full folder tree preserved, zipped.
OLM → EML (ZIP)
One .eml per message, the folder hierarchy kept intact.
OLM → PDF
Print-ready PDFs of your messages for archiving or sharing.
OLM → CSV
A message metadata table you can open in any spreadsheet.
OLM → HTML (ZIP)
A browsable offline HTML archive with an index page.
OLM → ICS
Calendar events ready for any calendar app.
OLM → VCF
Contact cards ready for any address book.
From .olm to a file you can use.
Open the .olm archive
Pick the .olm file exported from Outlook for Mac — from the Files app, a download, AirDrop, or the share sheet. It opens on your device; nothing is uploaded and the original is never changed.
Browse what's inside
Read the mail with its attachments and page through contacts, calendar events, notes, and tasks. Confirm it's the right archive and find what you need — all free.
Pick a format to convert to
Choose where the mail is going: MBOX or EML for Apple Mail and Thunderbird, PDF for print-ready copies, CSV for a spreadsheet, HTML for an offline archive, ICS for calendar, or VCF for contacts.
Export and import yourself
Save the converted files (and any attachments) to your device, then import them into the mail, calendar, or contacts app of your choice on your own terms.
Mail, contacts, calendar — all of it.
Read every message with its attachments, then convert to MBOX, EML, PDF, or CSV.
Browse the address book and export it as VCF contact cards.
View events and export them as ICS for any calendar app.
Browse the notes stored inside the archive.
Browse the tasks and reminders saved inside the archive.
A focused OLM toolkit.
Browse the Whole Archive
Read mail with attachments and page through contacts, calendar events, notes, and tasks inside an .olm — a full viewer, not just an extractor.
Convert to MBOX for Mail Apps
Export one MBOX mailbox to drop into Apple Mail or Thunderbird, or a ZIP of MBOX files with one mailbox per folder and the full folder tree preserved.
Convert to EML Messages
Produce a ZIP of individual .eml files, one per message, with the folder hierarchy kept intact — ideal for importing messages selectively.
PDF, CSV, and HTML Output
Make print-ready PDFs of messages, a CSV table of message metadata for spreadsheets, or a browsable offline HTML archive with its own index page.
Calendar and Contacts Export
Turn calendar events into ICS files and contacts into VCF cards, so they import straight into your calendar and address book apps.
Save Every Attachment
Open the attachments inside your mail and save or share each one on its own — a document locked in an old email becomes a normal file again.
100% On-Device
Your archive is opened, browsed, and converted entirely on your iPhone, iPad, or Mac — no upload, no cloud, no account, no tracking.
Straight About What It Does
It converts to open formats and produces files you import yourself. It does not export PST, read .pst files, or connect to any mail account — and it says so up front.
Opening, browsing, and every conversion run entirely on your device. Your .olm is never uploaded to a server, routed through the cloud, or tied to an account — no sign-in, no telemetry, no tracking. It needs no internet connection to work.
The app only reads from your .olm and writes each conversion into a separate file. Your source archive is left exactly as it was, so nothing is overwritten and you keep the original to convert again any time.
Opening an archive and previewing the mail, contacts, calendar, notes, and tasks inside is free, so you can confirm it's the right file first. Converting, exporting, and saving attachments unlock with a plan or a one-time purchase — no account.
- You switched from a PC or a different mail setup, were handed an .olm archive of your old mail, and need to actually open and read what's inside.
- Moving years of Outlook-for-Mac mail into Apple Mail or Thunderbird by converting the archive to a single MBOX file or per-folder MBOX, then importing it yourself.
- Pulling individual messages out of a big archive as separate .eml files so you can import just the ones you need, with the folder structure preserved.
- Keeping a few important emails as print-ready PDFs, or building a CSV table of message metadata to sort and search in a spreadsheet.
- Recovering the calendar and contacts trapped in an old archive by exporting events as ICS and contacts as VCF for your calendar and address book.
- Archiving an old mailbox as a self-contained, browsable offline HTML folder you can open any time without any mail program at all.
Free to open any .olm archive and browse the mail, contacts, calendar, notes, and tasks inside, including previewing messages and attachments. Converting and exporting — to MBOX, MBOX-as-ZIP, EML-as-ZIP, PDF, CSV, HTML-as-ZIP, ICS, or VCF — and saving attachments are unlocked with a weekly or annual plan, or a one-time Lifetime purchase. Your choice, and no account is required.
Opening & converting OLM files.
What is an OLM file?
An .olm is the archive that Outlook for Mac exports. It packs a whole mailbox into a single file — folders of mail with attachments, plus contacts, calendar events, notes, and tasks. Most other apps can't open it directly, which is exactly what this app is for.
How do I open an OLM file on a Mac?
Open it in OLM Converter. It's a standalone app for Mac (and iPhone and iPad) that reads the .olm directly — you don't need the program that created it. Just add the file and browse everything inside.
Can I open an OLM file without Outlook for Mac?
Yes. The whole point of the app is to open and read an .olm on its own, without the original mail program. You can browse the mail, contacts, calendar, notes, and tasks, then convert the contents to open formats.
Can I open an OLM file on Windows?
OLM Converter runs on iPhone, iPad, and Mac. On any of those it opens an .olm directly without the program that created it. It reads .olm archives only — it does not read .pst files — and its output formats (MBOX, EML, PDF, CSV, and the rest) open on Windows too once you've converted and moved them over.
How do I view an OLM file's contents?
Open the archive and the app lays out its folders so you can read messages with their attachments and page through contacts, calendar events, notes, and tasks. Browsing and previewing are free — you only pay when you want to convert or export.
Can I convert OLM to PST?
No. OLM Converter does not export PST and does not read .pst files. If your goal is to move the mail into another app, convert to MBOX or EML (or PDF and CSV) instead — those import into the common mail programs, which is the practical path most people actually need.
How do I import OLM mail into Outlook or Outlook on the web?
The app produces files rather than connecting to any account, so the route is to convert first, then import yourself. Export EML messages or an MBOX mailbox and bring those into Outlook or Outlook on the web through its own import. The app never signs into or touches your account.
How do I get OLM mail into Apple Mail or Thunderbird?
Convert the archive to MBOX. Choose a single MBOX file, or a ZIP with one MBOX per folder so the tree is preserved, then import that into Apple Mail or Thunderbird — both read MBOX. You do the import yourself, keeping full control.
Can I move OLM mail to Gmail?
Indirectly, yes. The app converts to standard formats like EML and MBOX; you then import those into the mail setup of your choice. OLM Converter does not connect to Gmail or any other account directly — it gives you clean files to import on your own terms.
Which formats can it convert to?
OLM to a single MBOX mailbox; OLM to MBOX as a ZIP (one mailbox per folder, tree preserved); OLM to EML as a ZIP (one file per message, hierarchy intact); OLM to PDF (print-ready messages); OLM to CSV (message metadata for spreadsheets); OLM to HTML as a ZIP (an offline browsable archive with an index page); OLM to ICS (calendar); and OLM to VCF (contacts).
How do I convert an OLM file to CSV?
Open the archive and choose the CSV conversion. It produces a table of message metadata you can open in a spreadsheet to sort, filter, and search your mail. The message bodies themselves are better kept as PDF, EML, or MBOX.
Can it export the calendar and contacts too?
Yes. Calendar events convert to ICS files and contacts convert to VCF cards, so they import straight into your calendar and address book apps. Notes and tasks can be browsed inside the archive as well.
What about the attachments inside my mail?
Attachments are read along with the mail, and you can save or share each one on its own. A document or image buried in an old email becomes a normal, openable file again.
Does it upload my archive anywhere?
No. Everything happens on your device — opening, browsing, and every conversion. Your .olm is never uploaded to a server, copied to the cloud, or sent through an account. There's no sign-in and no tracking, which matters for private or work mail.
Does converting change my original .olm file?
No. The app only reads from your archive and writes each conversion into a separate file. The original .olm is left exactly as it was, so you can convert it again to a different format any time.
What can I do for free, and what's paid?
Opening an archive and browsing or previewing the mail, contacts, calendar, notes, and tasks inside are free. Converting, exporting, and saving attachments are unlocked with a weekly or annual plan, or a one-time Lifetime purchase — no account required.
Stop staring at an .olm you can't open.
Open the archive, browse the mail, contacts, calendar, notes, and tasks inside for free, then convert to the open format you actually need — MBOX, EML, PDF, CSV, HTML, ICS, or VCF — all on your own device, with no account and no upload.