forSheets (and giggles)

Setlist converter for forScore (.4ss) and MobileSheets (.mss).

MobileSheets forbids \ / : * ? " < > | + , and control characters. Warn lists them and asks before converting; strip removes them; replace swaps in the replacement character.
forScore placeholders have no MobileSheets equivalent. Skip drops them; blank keeps them as Blank songs (FileType 5), mapped back to placeholders on return. Bookmarks map to the full parent PDF, not the bookmarked pages. Suffixed appends “ (bookmark)” to the title so the loss is visible.
Recommended — .mss files list songs only, no PDF data. Uncheck if MobileSheets already has these PDFs, or the .4ss has none embedded to pack.

Who this is for and how conversion works

forSheets is for gigging musicians caught between apps: half the band reads forScore on iPads, the other half reads MobileSheets on Android tablets, and every setlist gets retyped by hand. Share the setlist out of one app, convert it here, import it into the other — titles and PDF filenames are preserved so either app matches entries against the library already on the tablet.

Conversion preserves titles and filenames for matching inside either app — nothing is uploaded, everything runs in memory in your browser. How it works · full walkthroughs.

How to convert forScore to MobileSheets and back

Convert .4ss to .mss (forScore → MobileSheets)

  1. In forScore, share the setlist with Include Scores so the PDFs come along — how to share a forScore setlist.
  2. Upload the .4ss file above and press Convert.
  3. Download the .mss setlist plus the Scores/ PDFs (or the .zip bundle) and batch-import them into MobileSheets.

Full walkthrough with import detail: forScore → MobileSheets guide.

Convert .mss to .4ss (MobileSheets → forScore)

  1. In MobileSheets, long-press the setlist → Export setlist (.mss) to device storage to get an .mss file — video: sharing a MobileSheets setlist.
  2. Upload the .mss file together with its .pdf files. Matching PDFs are embedded into the .4ss.
  3. Import the converted .4ss into forScore.

Full walkthrough with import detail: MobileSheets → forScore guide.

What converts to what (.4ss ↔ .mss)
  • Bookmarks import as the whole parent PDF — the bookmarked pages don't cross over.
  • Placeholders and proprietary .msf/.msb bundles need special handling — see troubleshooting.

Frequently asked questions
How do I convert a forScore .4ss setlist to MobileSheets .mss?

From forScore, share with Include Scores, drop the .4ss onto the converter above, then bring the resulting .mss and Scores PDFs into MobileSheets — the step-by-step is in the forScore → MobileSheets guide.

How do I convert a MobileSheets .mss setlist to forScore .4ss?

In MobileSheets use Export setlist (.mss) for an .mss file, convert it here together with the song PDFs, then open the finished .4ss in forScore — details in the MobileSheets → forScore guide (different device? Share it to yourself instead; older versions call it Share song list).

Why are my .msf or .msb files rejected?

Those are MobileSheets-only bundle formats the converter can't read — share the setlist as .mss instead, as explained in troubleshooting.

Is my sheet music uploaded to the internet?

No. Everything happens on your device and vanishes when you close the tab — see Privacy. On an old browser, switch to a current Chrome/Edge/Firefox/Safari.

Something isn't working or I've found a bug!

Sorry about that — mail help@forsheets.app with the warning text and we'll dig in (more on the contact page).