Albert Wiersch

Meet CSS HTML Validator for Windows, Mac*, and Linux*. A fast and powerful HTML, CSS, accessibility, SEO, link, and spell checker that works offline.

[Albert Wiersch @htmlvalidator]

✅ htmlval for Mac v26.02 is now available! #WebDevelopment

[Albert Wiersch @htmlvalidator]

✅htmlval for Linux v26.02 is now available! #WebDevelopment

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2026/v26.02 update is now available! ✅✅✅ https://t.co/vv4AchQZWV ✅✅✅

#HTML #CSS #a11y #WebDevelopment

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2026/v26.02 update is now available!
✅https://t.co/vv4AchQZWV✅
#HTML #CSS #a11y #WebDevelopment

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2026/v26.01 update is now available! ✅ https://t.co/4dEXcarYcY ✅ #HTML #CSS #a11y #WebDesign

[Albert Wiersch @htmlvalidator]

The htmlval FREE limited versions for Mac and Linux have been updated to v26.00. These are FREE limited versions of htmlval, a command-line console tool based on the core validation engine in CSS HTML Validator for Windows. #Linux #HTML #Validation #Mac

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2026/v26 is now available!
✅ https://t.co/4dEXcarYcY ✅
#HTML #CSS #a11y #WebDesign

[Albert Wiersch @htmlvalidator]

@craigbuckler - contact me at [email protected] !

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2025/v25 is now available!
✅ https://t.co/4dEXcasw2w ✅
#html5 #CSS #WebDevelopment

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2025 coming soon! #html5 #AccessibilityForAll

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2024/v24.03 is now available!
✅ https://t.co/4dEXcarYcY ✅
#html #css #htmx #webdesign

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2024/v24.02 is now available!
✅ https://t.co/4dEXcarYcY ✅
#html #css #htmx #webdesign

[Albert Wiersch @htmlvalidator]

Did you know that you can run CSS HTML Validator (and other compatible Windows applications) on Linux, macOS, & BSD using Wine? https://t.co/y5lL1UDIS4

#wine #webdevelopment #HTML

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2024/v24.01 is now available!
✅ https://t.co/4dEXcarYcY ✅
#html #css #htmx #webdesign

[Albert Wiersch @htmlvalidator]

@palo_alto_seo And validate it with CSS HTML Validator!

[Albert Wiersch @htmlvalidator]

CSS HTML Validator 2024/v24 is now available!
✅ https://t.co/4dEXcarYcY ✅
#html #css #htmx #webdesign

[Albert Wiersch @htmlvalidator]

FREE 2024/v24 Upgrade: Buy a new 2023/v23 license or upgrade to 2023/v23 (Home, Pro, or Enterprise) and get a guaranteed free upgrade to 2024/v24 when available.

#htmx support coming soon!

#HTML #html5 #CSS

[Albert Wiersch @htmlvalidator]

CSS HTML Validator v23.04 is now available!
✅ https://t.co/4dEXcarYcY ✅
#html #css #htmlskills #html5validation #webdesign

[Albert Wiersch @htmlvalidator]

@htmx_org Good news! CSS HTML Validator 2024/v24 will have support for htmx! https://t.co/4dEXcarYcY

#html #htmx

[Albert Wiersch @htmlvalidator]

#html #htmx @jchibbard

htmx... interesting but not valid HTML.

https://t.co/ye8UGknP8B