Palindrome Analyzer
Check phrases and lines for palindromes, compare exact or normalized text, locate mismatches and find the longest palindromic substring.
Ready. Explore the example or use the input controls to begin.
Scope and practical limits
Up to 500 lines and 50,000 characters. Longest-substring analysis runs only on lines up to 2,000 graphemes. Normalized mode ignores punctuation, spacing and case.
The tool processes your work in the browser. The website’s advertising and analytics follow its privacy and consent settings. Projects are not saved automatically. Media workspaces export their files directly rather than storing them in project JSON.
Using Palindrome Analyzer
Unicode grapheme segmentation keeps combined characters together. Normalization uses NFKC and lowercase.
- Start with the included example, or enter your own input.
- Adjust the settings and review the preview and any validation message.
- Download the result or save a project to continue later.
Example
A man, a plan, a canal: Panama! is a palindrome in letters-and-numbers mode.
Questions & answers
Why can exact and normalized results differ?
Exact mode compares every grapheme. Normalized mode removes punctuation and spacing and ignores letter case.
Is my project saved automatically?
No. Use Save project to keep an editable copy. Processing runs in the browser; site ads and analytics follow the website privacy and consent settings.
Related tools
A useful next step for your task.
Text & WritingROT13, ROT47 & Caesar WorkbenchEncode or decode ROT13, ROT47 and Caesar text with adjustable shifts, instant preview, projects and text export.
Text & WritingBBCode Preview & ConverterPreview supported BBCode, extract readable text and export escaped HTML with safe links and no remote image loading.
Text & WritingText Compare / Diff CheckerHighly recommendedCompare two texts locally with word or line highlighting, ignore-case and spacing options, change navigation and TXT, JSON or printable HTML reports.
Text & WritingText to SpeechHighly recommendedCreate English speech locally with 28 voices, instant audio samples, adjustable pacing and WAV or MP3 downloads. Includes script projects and…
Help improve this tool
Report a problem or suggest an improvement
Describe the issue without pasting private tool input. Feedback goes to our admin inbox.