Open SchDoc files in your browser
The circuit diagrams Altium Designer saves beside its boards. Open one right here, sheet by sheet, with no CAD app. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your board opens as it's made, from the top and from below, with its polygons as Altium last poured them, a schematic sheet by sheet in Altium's colors, and a library a footprint or symbol at a time.
- Every layer • Hide one or show one alone
- A board's top and, mirrored beside it, its bottom
- Search its text • Designators, values and net labels
- Export • PNG, SVG, PDF and the bill of materials
About SchDoc
Protel DXP gave each schematic sheet a .SchDoc of its own in 2002, and Altium Designer has saved them since. A design's sheets are tied together by its project, a .PrjPcb, and by the sheet symbols on a top sheet that stand for the sheets below it.
A SchDoc is a Compound File whose records are the sheet's objects in the order Altium draws them: each part with its pins, designator and parameters, the wires and buses between them, net labels, ports and power ports, junctions, notes, pictures, and the sheet's own border, title block and template. A part keeps its own copy of its symbol, so a sheet needs no library to open.
Filepeek reads it in your browser and draws each sheet on white in Altium's colors, in its border with the title block and the logo its template carries. Drop a design's sheets together and each sheet a sheet symbol names opens with it. Search finds a part by its designator or value, each layer can be hidden or shown alone, and Export saves a sheet as PNG or SVG, every sheet as PDF, or the bill of materials as CSV.
Altium schematic
.schdoc
Format
- MIME type
- application/octet-stream
- Made by
- Altium, which began as Protel
- Released
- 2002
Inside the file
- Holds
- Parts, wires, net labels, ports and notes
- Symbols
- Copied in, so no libraries are needed
- Sheets
- Joined by sheet symbols and the project
- File
- A Compound File of records, or ASCII text
Opens in every browser
Filepeek opens Altium schematics in Chrome, Edge, Firefox and Safari, binary or saved as ASCII. On their own, browsers download them, and Altium Designer runs only on Windows.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open SchDoc
- WindowsAltium Designer, paid • KiCad imports it, free
- MacKiCad imports it, free
- iPhone and iPadNo app built in opens it
- AndroidNo app built in opens it
Questions
How do I open a .SchDoc file without Altium?
Drop it on this page or press Peek a SchDoc. Every sheet opens in Altium's colors, with nothing to install. To change it without Altium, KiCad, which is free, imports it.
Why are some of my sheets missing?
Each sheet of a design is a file of its own. Drop the design's folder, or all its .SchDoc files together, and every sheet a sheet symbol names opens with the sheet it's on, listed down the left.
Why does a value show as =Something or *?
Altium fills those from the project or the document's parameters when it shows them. Filepeek fills what the sheet itself keeps, and a value only the project holds shows as Altium saved it.
How do I find a part on a big schematic?
Press Search and type its designator, like R12, or its value, like 10k. Search looks through every sheet and steps from match to match.
Can I see the board too?
Yes. Open the project's .PcbDoc and the board shows as it's made, from the top and from below.