TEJAS OS
Familiar from the first click
A taskbar, a Start menu, This PC and a Help centre in plain words. If you have used Windows, you already know TEJAS.
12 Indian languages
Pick yours when you install. Hindi, Tamil, Bengali, Punjabi and more.
A free desktop operating system, made in India for Indian homes, schools and offices.
Tap a language and watch TEJAS say hello. Change it any time after you install.
Built for how India really uses computers
Windows 10 support ended on 14 October 2025.Source
TEJAS installs security updates by itself, every day, for free.
Only about 1 in 10 Indians speaks English.Census 2011
TEJAS runs in 12 Indian languages, with typing in Indian scripts built in.
India made over 14 lakh tonnes of e-waste in 2025-26.Source
TEJAS Lite gives older PCs a new life instead of the scrap heap.
Everything a family needs, already inside
No licence keys, no accounts, no trial periods. Just switch it on.
FREE
Firefox, LibreOffice and an app store
Browse, write, make sheets and slides, play music and videos. Tap Get more apps for GIMP, Krita, Kdenlive and games.
Bridge for Windows apps
Run many Windows programs inside TEJAS with one click.
Safe by default
Firewall on, daily security updates, no tracking added by TEJAS. Every download is signed.
Gentle on older PCs
TEJAS Lite fits on a 4 GB pen drive and runs on machines Windows 11 left behind.
Install in three steps
About 20 minutes and one pen drive. Try it first without touching your files.
Download
Get TEJAS Lite, one file of about 2 GB.
Make a pen drive
Open Rufus, pick the file and your pen drive, and choose DD Image mode when it asks.
Start and pick your language
Restart, press F12 (or F9, F11) for the boot menu, pick the pen drive, then click Install TEJAS.
Download TEJAS
Free for everyone, no sign-up. Both editions have all 12 Indian languages.
TEJAS Lite
Version 1.02.0 GB, one file
- Desktop, Firefox, LibreOffice, media players
- App store and one-click Get more apps
- Best for older PCs and slow internet
- Built on
- Debian 13, KDE Plasma 6
- Your PC
- 64-bit, 4 GB RAM and 20 GB free space recommended
- Pen drive
- 4 GB or larger
- SHA256
82d226b7a8f8faff1aef787a4f6a87c8ba11d1fcd4f53994b862a7e77660f39a
TEJAS Full
Version 1.05.4 GB, 3 parts
- Everything in Lite, plus GIMP, Krita, Inkscape
- Kdenlive, OBS, Blender, Thunderbird and games
- Join the parts with one double-click
- Built on
- Debian 13, KDE Plasma 6
- Your PC
- 64-bit, 4 GB RAM and 30 GB free space recommended
- Pen drive
- 8 GB or larger
- SHA256
fd6f12390c6698a58fabba91caa3999664d9ed740a0ed56fbd118bacd633b1a3
How to check your download is genuine
- Windows: open PowerShell in your Downloads folder and run
Get-FileHash tejas-1.0-lite-amd64.iso. The code it shows must match the SHA256 above. - Mac or Linux: run
shasum -a 256 tejas-1.0-lite-amd64.isoand compare. - Signed builds: every ISO is built in public and signed by GitHub. Run
gh attestation verify tejas-1.0-lite-amd64.iso --repo Jkrocks/JK.
See exactly what's inside: Lite package list, Full package list, source code, MIT licence.
By downloading you agree to the Terms & Conditions. Back up your files before installing.
The research behind TEJAS
An 8-page paper on why India needs a free desktop in its own languages, and how TEJAS is built to deliver one.
- The problem. Cost, language, old PCs and privacy, framed as five research questions.
- What came before. Lessons from BOSS Linux, Maya OS and BharOS.
- How it works. Architecture, Indian language support, signed builds and Secure Boot.
- Honest gaps. What still needs testing in real Indian homes.
Khalsa, J. (2026). TEJAS OS: Made in India, Made for India. JK Design, Mumbai.
Made in India.Made for India.
TEJAS is open source and free for life. Designed in Mumbai by Jaspal Khalsa at JK Design, and built on Debian and KDE, trusted by millions worldwide. Vocal for local.