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QSPICE Viewer

Open QSPICE .qsch schematics without QSPICE. Nothing is uploaded.

QspiceOpenFreeNo signupOn your device
Opening the tool…

What this tool does

QSPICE Viewer draws a QSPICE .qsch schematic in this browser and lists its parts, nets, simulation commands and SPICE netlist, ready to save as PNG, SVG, PDF or CSV.

How to use it

  1. Choose a .qsch file, or drop it on the box. You can also choose a ZIP that contains the schematic. Nothing is uploaded.

  2. The .qsch drawing opens fitted to the screen. Drag to pan, scroll or pinch to zoom, and tap Fit when you want the whole sheet again.

  3. Tap a wire to highlight that net across the sheet and list the pins on it. Tap a part to read its reference, value and pin nets.

  4. Download PNG, SVG or PDF for a report, Netlist for a .net file you can run elsewhere, Parts CSV for a spreadsheet, or Copy netlist for the clipboard.

Common uses

QSPICE from Qorvo is a free circuit simulator that many power-electronics and RF engineers use alongside, or instead of, LTspice. Its schematics are .qsch files. A lecturer shares a lab circuit, a forum answer attaches a fixed design, a colleague mails a buck converter, and Qorvo publishes example projects. The catch is that QSPICE runs only on Windows. On a phone, a Chromebook, a Mac, a Linux laptop or a locked office PC there is nothing to open the file with. This page draws it in a few seconds anywhere.

Unlike LTspice, a QSPICE schematic keeps the drawing of every part inside the .qsch file itself. Resistors, capacitors, inductors, sources, transistors and custom symbols open with their outlines, reference names and values, in every rotation QSPICE saved. You do not need a separate symbol library just to see the circuit.

Tap any wire and the whole net lights up, with a line telling you its name and every pin on it. That makes it quick to check how a circuit hangs together without tracing lines by eye. Below the drawing you get a parts list grouped by type and value (for example R1, R3: Resistor, 10k), the simulation commands such as .tran, .ac or .step, the notes written on the sheet, and a SPICE netlist you can download for QSPICE or ngspice.

People also open .qsch files just to confirm what was sent: a hiring take-home, a vendor evaluation board, or a design review pack. A PNG or PDF from this page is enough to put the schematic into a report without installing QSPICE or asking the author for a screenshot.

Private, and the limits

Your schematic never leaves your device. The .qsch file is read by code running in this tab, and the images, PDF, netlist and CSV are made on your computer as well. There is no upload, no account and no AI model, so unreleased designs and coursework stay private. Closing the tab clears everything.

This is a viewer, not a simulator. It does not run the circuit or show waveforms, and you cannot edit the schematic. Fonts can differ slightly from QSPICE, and a few rare drawing primitives may be simplified.

Official sources

Last checked 2026-11-06.

FAQ

How do I open a .qsch file without QSPICE?
Choose the .qsch file on this page. The schematic opens in Chrome, Edge, Firefox or Safari on Windows, Mac, Linux, a Chromebook, Android or iPhone, with nothing to install.
Is my circuit uploaded anywhere?
No. The .qsch file stays in this browser tab. TaskNinja never receives the circuit, and closing the tab clears it.
Can I save the schematic as an image or PDF?
Yes. PNG or SVG saves the sheet in black and white for a lab write-up. The PDF adds the parts list, simulation commands and netlist on later pages.
Can this page run the simulation?
No. It draws the schematic and builds a SPICE netlist only. Download that netlist and run the simulation in QSPICE or free ngspice.
Does it open the same files as QSPICE on Windows?
Yes for normal .qsch schematics. Password-protected or damaged files, and some rare Verilog-linked blocks, may not draw fully; the page says so when that happens.
How is this different from the LTspice Viewer?
LTspice uses .asc files; QSPICE uses .qsch. They are different formats. Use the LTspice Viewer for .asc files and this page for .qsch files.

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