Producer reference imports
Convert a sheet music PDF you bought online, load the MIDI in Logic / FL Studio / Ableton, and audition the arrangement before deciding to cover it.
Beta · Online tool
PDF to MIDI Converter
Upload a digital or scanned score PDF and download a .mid file
Learn more
Upload one sheet-music PDF. Clear digital PDFs use structure-aware recognition, while scanned PDFs become AI-recognized MIDI drafts that should be proofread. For images or MusicXML, use Sheet Music to MIDI.
Upload a PDF
Upload one digital or scanned score PDF. Clear digital PDFs use structure-aware recognition; scanned PDFs become an AI draft to proofread.
PDF conversion uses 4 credits. Sign in before conversion; the file stays in this browser.
Choose a PDF to start
PDF only: PDF. Max 12.0 MB.
PureMIDI product facts
PureMIDI accepts a single sheet-music PDF and processes it on the server to produce a playable, editable MIDI draft.
- Product
- This dedicated PDF entry recognizes staff notation; it is not a general document-to-audio converter.
- Intended for
- Musicians, arrangers, students, teachers, and archivists converting PDFs they own or may use.
- Supported input
- This page's upload picker accepts one PDF containing staff notation. For images, MusicXML, or MXL, use the sheet-music page's matching picker and workflow.
- Output
- A standard .mid draft for playback, download, and proofreading in the PureMIDI editor or notation software.
- Workflow
- Upload one PDF → the server parses or recognizes the score → preview the MIDI → proofread pitch, rhythm, parts, and page transitions.
- Honest limitations
- PDF recognition is a draft workflow, not guaranteed note-perfect engraving. Scans, handwriting, dense polyphony, repeats, and ornaments need review.
- Official source
- The official product name is PureMIDI and the canonical domain is puremidi.com. Official PureMIDI page
Fixed score benchmark v1 · July 23, 2026
Inspect the score pipeline with real files
One frozen public example is tested through deterministic MusicXML parsing and PDF recognition. Inputs, raw MIDI outputs, hashes, and the complete report are published without hand correction.
| Route | Raw result | Evidence | MIDI preview |
|---|---|---|---|
| MusicXML parser | 263 notes · 2 tracks · 45s | Deterministic structure path | |
| PDF recognition | 104 notes · 3 tracks · 33.16s | KIE Gemini 3.5 Flash · 1 rendered page |
Pitch precision
88.5%
Pitch recall
35.0%
Pitch F1
50.1%
Pitch-only comparison: 88.5% precision, but only 35.0% recall. The PDF result omits much of the accompaniment, so it is an editable draft, not a complete transcription.
The MusicXML file is the structured reference for the matching PDF. Pitch metrics compare note-name counts only; they do not score timing, duration, voices, lyrics, dynamics, or engraving.
PDF-to-MIDI workflow
- 01
Upload a PDF
Choose one digital or scanned score PDF within the current file-size limit.
- 02
Recognize notation
Digital PDFs use structure-aware recognition; scanned PDFs use AI score recognition.
- 03
Review and export
Check pitch and rhythm, then download .mid or continue editing the draft.
What people actually do with the converter
Cover and remix
Take a PDF score, convert to MIDI, re-orchestrate with new instruments and beats.
Piano students
Convert assigned études to MIDI and play along at half speed in your DAW or notation app.
Teacher grading
Convert a student's submission to MIDI as the answer key for fast playback grading.
Tool boundaries & limits
- Current beta uploads are limited to about 12MB for stability.
- Scanned PDFs are best treated as editable drafts; dense polyphony, handwriting, TAB, numbered notation, and historical notation should be proofread in notation software after export.
- PDF/image score conversions use 4 credits. If a conversion cannot be completed, its credits are returned.
- Credit packs are one-time purchases (no expiration), good for occasional or burst usage. See /pricing for current packs.
Improve PDF recognition quality
Prefer a PDF exported directly from notation software. For scans, use at least 300 dpi, crop borders, remove shadows, and correct skew. Dense polyphony, handwriting, TAB, and ornaments still need proofreading after export.
Core audio to MIDI paths
Choose the conversion path that matches your source. These pages separate general audio, compressed MP3, YouTube/YT workflows, and local MP4/video files so each search intent has one clear owner.
AI audio to MIDI converter
Best default for WAV, M4A, FLAC, recordings, stems, and authorized audio exported from video.
MP3 to MIDI converter
Use the MP3-specific page when your source is compressed MP3 and you need bitrate or retry guidance.
YouTube to MIDI workflow
Preview a link, confirm rights, then upload audio you own or are licensed to use for MIDI conversion.
MP4 / Video to MIDI converter
Upload a local MP4, MOV, WebM, or M4V and convert its audio track directly to MIDI.
Already have a MIDI file?
If another score-recognition tool, DAW, or notation app already gave you a .mid file, open it in PureMIDI's online editor for a quick cleanup pass.
Tool-focused FAQ
Do I need to sign up?+
Yes. PDF conversion requires sign-in. Successful MusicXML/MXL conversion uses 1 credit; PDF conversion uses 4 credits.
Do you keep my PDF?+
PDF source files for successful conversions are deleted within 3 days. Failed-conversion sources may be retained for up to 14 days for recovery and support. Deleting the conversion requests immediate cleanup of its source and output files.
Is batch conversion supported?+
The beta handles one file at a time. Batch queues and one-click re-run come after score recognition quality is stable.
Can I get MIDI and MusicXML?+
Yes. Download MIDI directly, or open the score draft in the online editor, review pitch and rhythm, and export .musicxml.
Can I set the BPM before converting?+
The beta uses the score tempo when available and falls back to a default BPM. Manual BPM override is a next-step control.
Do I get refunded if a conversion fails?+
If a conversion cannot be completed, its credits are returned. A successful conversion that produces an editable MIDI draft uses credits even when the result still needs proofreading.
Is there an API?+
Not yet. We are stabilizing the web converter and failure taxonomy before exposing a public webhook/API flow.
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