What is bidi reordering?

Bidi (bidirectional) reordering is the process of arranging text characters in the correct visual order when a document contains both left-to-right and right-to-left scripts.

Can I use my own fonts?

Yes, you can upload a custom TTF or OTF font file to ensure specific RTL scripts render correctly in your PDF preview.

Does this tool support mixed-direction text?

Yes, you can enable the 'Include Mixed Sample' option to see how the PDF engine handles lines containing both LTR and RTL characters.

What page sizes are supported?

The tool supports standard A4, Letter, and Legal page sizes for your layout testing.

How do I ensure the text aligns correctly?

You can use the Alignment dropdown to set the text to Left, Center, or Right, or select 'Auto' to let the tool determine the best fit based on the base direction.

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PDF RTL/LTR Support Tester (PDF双向文字测试)

Preview left-to-right and right-to-left text flow in PDF with bidi reordering

Details

What this tool helps you do

Test bidirectional text flow by rendering LTR and RTL samples side by side.

Features:

Bidi reordering with RTL detection or manual direction
Alignment and spacing controls
Optional guide lines to inspect layout
Mixed-direction sample line

Execution

Run this tool

Fill in the form, run the tool, and review the result in one place.

Inputs

Options are grouped so long tools stay easier to scan.

14 options

FilesUpload source files for this workflow.1

Font File (Optional)fileOptional

Single file max size: 10 MBSupported types: font/ttf, font/otf, application/x-font-ttf, application/x-font-opentype, application/octet-stream

ContentPaste or type the main input values.2

LTR TexttextareaRequiredRTL TexttextareaRequired

SettingsAdjust formats, ranges, numbers, and modes.9

Base DirectionselectOptionalAlignmentselectOptionalFont Size (pt)numberOptionalLine HeightnumberOptionalPage SizeselectOptionalTop Margin (pt)numberOptionalBottom Margin (pt)numberOptionalLeft Margin (pt)numberOptionalRight Margin (pt)numberOptional

TogglesEnable or disable optional behavior.2

Show GuidescheckboxOptionalEnabled when checkedInclude Mixed SamplecheckboxOptionalEnabled when checked

Result

Ready for a run

Run the tool to preview files, text, structured data, or streamed output here.

Samples

PDF RTL/LTR Support Tester (PDF双向文字测试)

What this tool helps you do

Run this tool

Inputs

Result

Examples that match this tool

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Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Multilingual Report Layout

2. Custom Font Validation

FAQ

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