Software · Development

KLayout

Viewer and editor for mask layouts.

Completely free
Windows and Linux
Open source
No account

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Winget (Windows Package Manager), Flathub
License: GPL-3.0+ — Open source (copyleft)confirmed by Winget (Windows Package Manager), Flathub
Open source: Yes
Commercial use: Yesconfirmed by Winget (Windows Package Manager), Flathub, Official plan pages (pricing, licence, terms)
Account required: Noconfirmed by Winget (Windows Package Manager)
Credit card required: Noconfirmed by Winget (Windows Package Manager), Flathub
Watermark: Not applicable
Ads: not documented
Platforms: Windows and LinuxEstablished by Linux: Flathub · Windows: Winget
Publisher: Matthias Köfferlein
Latest version: 0.30.13 (5 November 2026)
Latest activity: 7 November 2026
Source code: github.com/KLayout/klayout

At a glance

KLayout is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

Open source code
No account needed
Commercial use allowed

About

Mask layout viewer and editor for the chip design engineer.

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Winget (Windows Package Manager) (credit card, account, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Facts collected from Official plan pages (pricing, licence, terms) (commercial use) — 10 November 2026
Last technical check: 8 November 2026
Description from Flathub — AppStream (Flathub)

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