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View a FLT file online, free

Open and read .FLT files online. View source, logs and text with syntax highlighting, search and line numbers, free.

Drop your .FLT file here

Opens your .FLT file right here.

Choose file
Up to 50 MB · 160+ text and code extensions
Instant. Opens in seconds
No sign-up. Just open it
100% free. No limits on use

What you get for a .FLT file

We don't have a dedicated viewer for this format, so we identify and inspect it instead — honestly, only what can be read from the file.

01

Drop your .FLT file

Choose it or drag it in. It's read right here in your browser.

02

We identify it

We read the magic bytes to tell what the file really is, its MIME type, and whether the name matches the contents.

03

See the details

Any metadata we can extract (dimensions, EXIF/GPS, document author and dates), a hex view, plus readable text and strings found inside.

What is a .FLT file?

Plain text that programs, servers and people write every day.

An .FLT file is an OpenFlight Scene Description File developed by Presagis. It contains 3D data used for visual simulations and virtual environments. These files can be accessed and edited using software such as Blender, FlightSIM, ArcGIS Desktop, PolyTrans, and Remo 3D.

Programs that open .FLT files

Windows
3ds Max (with OpenFlight plugin), FME (Safe Software), Okino PolyTrans, Presagis Creator
macOS
OpenSceneGraph / osgViewer
Linux
Remo 3D, OpenSceneGraph / osgViewer
.FLT format details
Full nameOpenFlight 3D Scene Database
DeveloperPresagis (originally Software Systems Inc., 1985; acquired by MultiGen-Paradigm, then Presagis)
First released1985 (Software Systems Inc., for Evans & Sutherland visual simulation systems)
CategoryText & Code
MIME typeapplication/octet-stream

Related viewers

Every viewer is free to use.

Frequently asked questions

Is my .FLT file uploaded anywhere?

No. The file is read and highlighted for you.

Why do some characters look wrong (é, ł)?

That usually means the file was saved in one encoding and opened in another. We detect UTF-8, UTF-16 and the Windows-1250/1252 code pages automatically and show which one was used.

Can it handle huge log files?

Yes, up to 50 MB. Only the lines on screen are drawn, so scrolling stays smooth. Syntax colours are switched off for files over 1.5 MB to keep things fast.

How do the log level filters work?

We find levels like ERROR, WARN, INFO and DEBUG on each line. Lines without a level, such as stack traces, stay with the entry above them, so filtering to errors keeps the full trace.

Can I edit the file?

This is a viewer. To change code, download it or copy it into your editor. Converting encodings and line endings is planned.

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