Български | Català | Deutsche | Hrvatski | Čeština | Dansk | Nederlandse | English | Eesti keel | Français | Ελληνικά | Magyar | Italiano | Latviski | Norsk | Polski | Português | Română | Русский | Српски | Slovenský | Slovenščina | Español | Svenska | Türkçe | 汉语 | 日本語 |
R

ruler.codethoi.com

Registered
Screenshot ruler.codethoi.com
Website screenshot

About the projectRuler. codethoi. com is an online tool for measuring the actual dimensions of objects directly in your browser. The project is positioned as a virtual ruler, available on...

Page analyze update date: 2026/03/31 02:05:42
Last whois update date: 2026/06/08 20:05:03
Domain Status
Registered
Paid till
04.04.2027
Available from
04.05.2027

Website Description

📝

About the project

Ruler. codethoi. com is an online tool for measuring the actual dimensions of objects directly in your browser. The project is positioned as a virtual ruler, available on any device with a screen. The main idea of ​​the service is simple: replace a physical tool with a software solution that adapts to the user’s specific display.

The site offers measurements in three main systems: millimeters (mm), centimeters (cm) and inches. This makes it universal for various tasks - from household measurements to professional work of architects or designers. The tool works without installing additional programs; you just need to open the page in a modern browser.

Main directions

The project focuses on the accuracy of digital measurements. Since each screen has its own pixel density characteristics, the site provides calibration mechanisms. The user can manually adjust the pixels per inch (PPI) to make the virtual scale match the actual dimensions.

To simplify setup, the developers suggest using standard objects as a standard:

  • Banknotes (US dollar, euro).
  • Credit cards (standard sizes in width and height).
  • A4 size paper (portrait and landscape).
  • CDs.

The user compares the virtual line with the real object and adjusts the PPI value until it matches. The text gives an example: if the laptop screen has a resolution of 1366x768 with a physical size of 13.6 inches, the calculation gives about 100 pixels per inch, but for accuracy it is better to check and set a value like 100.7.

Site Features

The tool interface supports different units of measurement and allows you to switch between them. There is a choice of fine gradations - from 18 to 132 inches. This is important for tasks that require high detail.

The site works on different platforms: Windows, Mac, Android and iOS. Support is provided by all modern browsers. However, there is an important condition: the page scaling must be set to 100. Changing the scale through the browser or system font size can distort the proportions, so it is recommended to use zoom gestures on mobile devices to adjust the image rather than changing system settings.

The project also stands out for its support for multiple languages. The list contains options from English and German to Amharic, Azerbaijani and other rare languages. This allows the tool to be used by people all over the world without a language barrier.

FAQ

How accurate is the online meter?

Accuracy depends on proper calibration.If the user adjusts the pixels per inch (PPI) using a real reference (such as a credit card or banknote), the result will be comparable to a physical instrument. Without manual verification, deviations may occur due to differences in screen matrices.

Do I need to install special software?

No. The tool runs entirely inside the browser. No plugins or additional applications are required. All you need to do is access the site from your computer or smartphone.

What devices is the service available on?

The site supports all major platforms: Windows, macOS, Android and iOS. The main requirement is to use a modern browser and a fixed page scale of 100 to display the scale correctly.

How to adjust the accuracy of measurements?

You need to find an object of known size (for example, a US dollar or an A4 sheet), compare it with a virtual ruler and change the pixels per inch value in the settings until the sizes match. After this, you can save the settings for further work.

.

SEO Score
50%
73
Score achieved
146
Maximum score

Main Information

ℹ️
Title: Thước đo thuận tiện trên màn hình - Ruler Online (mm,cm,inches)
Description: Thiết kế đơn giản, dễ sử dụng ở bất cứ nơi nào bạn muốn. Đây là một thước đo ảo trực tuyến, nó có thể được điều chỉnh theo kích thước thực tế, và có cả đơn vị thang đo hệ mm,cm và inches.
Keywords: Thước đo thuận tiện trên màn hình, Thước đo kích thước thực tế Online, Actual Size Online Ruler (mm,cm,inches), Actual Size Online Ruler, Actual Online Ruler, Thước đo Online, Thước đo kích thước thực tế, Thước đo kích thước thực tế, milimét, centimet, inch, ruler, ruler online
Page Encoding: utf-8 Body and server charset are different!
Page Filesize: 38 KB

Server Information

🖥️
IP: 103.82.24.219
Location: Vietnam,VN,,,16.1667,107.8333,Asia/Bangkok
Http Server: microsoft-iis/10.0
Powered by: asp.net

Meta Tags List

🏷️

Internal Links

🔗

External Links

🌐

Whois Information

📄
domain_name: codethoi.com
update_date: 2025-01-05T17:50:55Z
update_time: 1736099455
creation_date: 2019-04-04T17:00:09Z
creation_time: 1554397209
expiration_date: 2027-04-04T17:00:09Z

Whois Raw Data

📋
            Domain Name: CODETHOI.COM
Registrar: GMO Internet Group, Inc. d/b/a Onamae.com
Domain Status: active
Creation Date: 2019-04-04T17:00:09Z
Registry Expiry Date: 2027-04-04T17:00:09Z
Updated Date: 2025-01-05T17:50:55Z
Name Server: NS-A1.CLOUDNETVN.COM
Name Server: NS-A3.CLOUDNETVN.COM
Name Server: NS-A5.CLOUDNETVN.COM
REGISTRAR Contact: GMO Internet Group, Inc. d/b/a Onamae.com
>>> Last update of RDAP database: 2026-06-08T20:05:03Z

SEO Audit

🔍

Technical SEO

Response Code
200
Status 200 OK - page loads correctly.
!
Character Encoding
Page: utf-8, Header:
Character encoding mismatch between HTML and HTTP headers.
Page Size
39682 bytes
Page size acceptable for fast loading.
!
Resources
144 total
Too many resources. Optimize and combine files for better performance.
Hreflang Tags
132 hreflang tags
Hreflang tags found for multilingual SEO.
!
Robots.txt
Missing
Add robots.txt file to control search engine crawling.
!
Sitemap
Not found
Add sitemap.xml and reference it in robots.txt.
HTTPS
Yes
Secure HTTPS connection enabled.
Compression
gzip
Gzip or Zstd compression enabled for faster loading.
!
Caching
Not set
Add cache-control headers to improve loading speed for returning visitors.
Page Speed
2.37 ms
Excellent loading speed.

On-Page SEO

!
Title
Thước đo thuận tiện trên màn hình - Ruler Online (mm,cm,inches)
Title too long. Reduce to 30-60 characters to avoid truncation.
!
Meta Description
Thiết kế đơn giản, dễ sử dụng ở bất cứ nơi nào bạn muốn. Đây là một thước đo ảo trực tuyến, nó có thể được điều chỉnh theo kích thước thực tế, và có cả đơn vị thang đo hệ mm,cm và inches. Lenght:187
Meta description too long. Reduce to 100-160 characters.
H1 Heading
1 found - "Thước đo thuận tiện trên màn hình (mm,cm,inches)"
Good - single H1 heading found.
Word Count
1408
Good content length (500-2000 words recommended).
!
Canonical Tag
Add canonical tag to prevent duplicate content issues.
Duplicate Meta
[]
No duplicate meta tags found.
Keywords
Thước đo thuận tiện trên màn hình, Thước đo kích thước thực tế Online, Actual Size Online Ruler (mm,cm,inches), Actual Size Online Ruler, Actual Online Ruler, Thước đo Online, Thước đo kích thước thực tế, Thước đo kích thước thực tế, milimét, centimet, inch, ruler, ruler online
Meta keywords set (note: not used by major search engines).

Content and UX

!
Language
Add lang attribute to tag for accessibility and SEO.
Images
0 total, 0 missing ALT
All images have proper ALT text.
Viewport
width=device-width, initial-scale=1
Viewport meta tag properly set for mobile devices.
!
Open Graph
Missing: og:description, og:image, og:url
Add missing OpenGraph tags for social media sharing: og:description, og:image, og:url
!
Structured Data
0 JSON-LD scripts
Add structured data (JSON-LD) for rich snippets and better SEO.

Positions in Google

Search Phrases - Google

🔍
Position Phrase Page Snippet
2(+4)линейка онлайн/mobile/ru/
2(+3)см онлайн/mobile/ru/
3измерить см/mobile/ru/
4линейка онлайн на экране в см реальный/mobile/ru/
4линейка 1 к 1/mobile/ru/
4линейка онлайн на экране реальный масштаб/mobile/ru/
4линейка в см на экране реальный масштаб/mobile/ru/
4покажи см/mobile/ru/
4прямо см/mobile/ru/
4измерение см/mobile/ru/

Positions in Yandex

Search Phrases - Yandex

🔍
Position Phrase Page Snippet
12см как/mobile/ru/

Additional Services

💎