View SL1 files in your browser
The file PrusaSlicer saves for Prusa's resin printers: a PNG of the screen for every layer. Open one right here and see the print before it cures. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your print opens in 3D, rebuilt from its layers, with a bar under it to build it up layer by layer and the slicer's picture and settings beside it.
- The layer bar • Build it up, the cut at each layer lit
- Inspect • The layer as the screen lights it, and its exposure
- Its size, layers, resin and print time
- Export • Layers as PNG or ZIP, STL and PNG
About SL1
PrusaSlicer writes SL1 files for the Original Prusa SL1 and SL1S Speed, and UVtools and Chitubox can write one too. It's a ZIP: a PNG of what the printer's screen lights for each layer, config.ini with the exposure, layer height, resin and print time, the slicer's settings, and its pictures of the print.
The printer reads the file from its USB stick or over the network. PrusaSlicer imports one back into a model and UVtools shows its layers, and any ZIP tool lists its PNGs, though nothing built into Windows, macOS or phones shows the print.
Filepeek reads the layers in your browser and rebuilds the print in 3D from them. Drag the bar under it to build it up layer by layer, the cut at that layer lit, and Inspect shows the layer as the screen lights it, with its exposure, and the job's resin, print time, layer height and printer. Export saves the layer as PNG, every layer as a ZIP, the print as STL and the slicer's picture.
Prusa SL1 print file
.sl1 • .sl1s
Format
- MIME type
- application/zip
- Made by
- Prusa Research
- Released
- 2019
Inside the file
- Layers
- A PNG of the screen each
- config.ini
- Exposure, layer height, resin and print time
- Pictures
- The slicer's previews of the print
- Settings
- PrusaSlicer's own, with the screen's size
Opens in every browser
Filepeek opens SL1 and SL1S files in Chrome, Edge, Firefox and Safari. On their own, browsers download them, and Windows, macOS, iOS and Android need PrusaSlicer or UVtools to see the print.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open SL1
- WindowsPrusaSlicer imports one • UVtools
- MacPrusaSlicer imports one • UVtools
- iPhone and iPadNo app built in opens it
- AndroidNo app built in opens it
Questions
Is an SL1 a ZIP?
Yes, and each layer is a PNG inside. Filepeek opens it as the print, rebuilt in 3D from its layers, and Export saves any layer as PNG or every layer as a ZIP.
Can I check a print before it goes to the printer?
Yes. Drag the bar under the print to build it up layer by layer and see what each layer cures, with its exposure in Inspect, so a part that starts in midair or a missing support shows before you print.
Can I get the model back as an STL?
Yes. Export's Save as STL writes the print rebuilt from its layers, as fine as the screen's pixels and the layer height. It holds the supports too, so the model you sliced is the better start for changes.