See how your Urdu text renders in a right-to-left, a left-to-right, and an automatic container, side by side, to catch layout problems.
Quick Answer
The Urdu RTL Rendering Tester shows the same text in three containers, right-to-left, left-to-right, and automatic, so you can compare how it lays out and spot rendering problems. It also flags the characters that affect rendering, such as joiners, combining marks, and the kashida. Everything runs in your browser.
Test RTL Rendering
Paste Urdu text to compare how it renders in each direction.
Rendering report
- Characters
- 0
- RTL letters
- 0
- Combining marks
- 0
- Rendering flags
- 0
Right-to-left container (dir=rtl)
Left-to-right container (dir=ltr)
Automatic container (dir=auto)
Rate This Tool
Tap a star to rate the Urdu RTL Rendering Tester.
What the Urdu RTL Rendering Tester Does
The Urdu RTL Rendering Tester shows your text in three containers at once, one right-to-left, one left-to-right, and one automatic, so you can compare how each lays it out. It also reports the characters that affect rendering, such as the zero-width joiner and non-joiner, combining marks, and the kashida.
Seeing the same text in each direction is the quickest way to reproduce and fix a layout problem.
Everything runs on your own device. Your text is never uploaded or stored, so it stays private while you test it.
How to Test Rendering
- Paste your text. Enter the Urdu text you want to check.
- Compare the containers. Look at the right-to-left, left-to-right, and automatic previews.
- Read the flags. See which characters affect the rendering.
- Copy or download. Copy the report, or save it as a text file.
The Three Containers
The right-to-left container forces the text to flow from the right, which is correct for Urdu. The left-to-right container forces it from the left, which shows how Urdu looks when a page sets the wrong direction. The automatic container picks the direction from the first strong character, the safest default for user content.
Characters That Affect Rendering
Some characters change how letters join or stack. The zero-width joiner and non-joiner control whether neighbouring letters connect. Combining marks sit on a base letter. The kashida stretches a join. The report flags these so you can tell whether they are helping or causing a problem.
Nastaliq and Naskh
Urdu is usually written in the flowing Nastaliq style, while Arabic is often naskh. The previews can use a Nastaliq font so the rendering matches how Urdu readers expect to see the text. Turn the option off to see a plain system font.
A Worked Example
Text:
Loading example…
Rendering report:
Loading example…
The live tester is preparing this example…
The result above comes from the same function the tool uses, so it reflects real behavior. Press Load Example to try it.
Who Uses This Tester
Developers and designers use it to check RTL layout. Publishers use it to preview Urdu text. Anyone laying out Urdu uses it to catch rendering problems early.
Accuracy and Limits
The tester shows how a browser renders the text with each direction, using your device’s fonts. The exact shapes depend on the font installed, so the same text may look a little different on another device. The character flags are based on the Unicode ranges of the characters found.
Good to know: if a Nastaliq font is not installed, the preview falls back to a naskh or system font.
Your Data Stays Private
The tester runs fully in your browser with standard web technology. Your text is not uploaded or stored, and it is not sent to any analytics service. Only your star rating is sent, to record the tool’s rating. When you close the page, your text is gone.
Frequently Asked Questions
What does the Urdu RTL Rendering Tester do?
It shows your text in a right-to-left, a left-to-right, and an automatic container at once, and flags the characters that affect rendering.
Why show three containers?
To compare the layout. The right-to-left container is correct for Urdu, the left-to-right shows the wrong direction, and the automatic one picks the direction for you.
Which characters affect rendering?
The zero-width joiner and non-joiner, combining marks, and the kashida, among others. The report lists the ones it finds.
Does the font matter?
Yes. Urdu looks best in a Nastaliq font. The preview can use one, and falls back to a system font if none is installed.
Will it look the same on every device?
The layout follows the same rules, but the exact shapes depend on the fonts installed on the device.
Is my data safe?
Yes. Everything runs in your browser. Your text is never uploaded, saved, or shared.
Is this tool free?
Yes, it is completely free and needs no account to use.
Does it work on mobile?
Yes. It works on phones, tablets, and computers.
Explore More Free Urdu Unicode and RTL Tools
Inspectors, detectors, cleaners, and normalizers built for real Urdu Unicode text.
Open the Urdu Tools hubSources and standards
- The Unicode Standard and code charts (Arabic block U+0600, Arabic Supplement, Presentation Forms). unicode.org/charts
- UAX #9, Unicode Bidirectional Algorithm (RTL, marks, isolates, overrides). unicode.org/reports/tr9
- UAX #15, Unicode Normalization Forms (NFC, NFD, NFKC, NFKD). unicode.org/reports/tr15
- MDN Web Docs, String.prototype.normalize and code point methods. developer.mozilla.org
This free tool renders your text in a right-to-left, a left-to-right, and an automatic container, and flags the characters that affect rendering. The exact shapes depend on the fonts installed on your device. Your star rating is stored on the site.