UD5 Toolkit
Basic Grammar Checker - Online Free Writing Assistant
Identify common grammar mistakes (subject-verb agreement, tense, articles) with simple rule-based analysis. Explanations provided. Not AI, purely rule-based and local.
Online Spell Checker - Free Text Correction with Suggestions
Online Spell Checker
Free text correction with suggestions â works entirely in your browser.
Instantly check and correct spelling in your English text. Our free tool highlights misspelled words and provides intelligent replacement suggestions. No downloads, no registration â your text stays private on your device.
Spelling Errors & Suggestions
- Start typing or paste text and click Check Spelling to see results.
Frequently Asked Questions
The tool compares each word in your text against a built-in dictionary of common English words. Misspelled words are flagged, and the tool suggests corrections by finding the closest matching dictionary entries using edit distance.
Absolutely. All processing happens locally in your browser. Your text is never sent to any server or stored externally. You can even use this tool offline after loading the page.
It includes a comprehensive list of frequently used English words. You can also add custom words to your personal dictionary by clicking the + button next to any suggestion. Custom words are saved in your browser's local storage.
Yes. Click the eye-slash icon next to a flagged word to ignore it during the current session. The word will be skipped in the active check, but it is not permanently added to your dictionary.
This tool focuses solely on spelling. For grammar and style suggestions, you would need a dedicated grammar checker. However, correcting many spelling mistakes often inadvertently improves the readability of your text.
Commonly Misspelled Words
| Incorrect | Correct | Incorrect | Correct |
|---|---|---|---|
| accomodate | accommodate | embarass | embarrass |
| seperate | separate | neccessary | necessary |
| occured | occurred | recieve | receive |
| definately | definitely | untill | until |
| wheather | whether | alot | a lot |
Accessible Text Formatter - Online Dyslexia Friendly Layout
Apply dyslexiaâfriendly fonts, spacing, and background to any text. Preview and copy the formatted version. Improve readability.
Text Similarity Checker - Online Cosine & Jaccard
Paste two texts and see cosine and Jaccard similarity scores. Understand how close two documents are. All local math.
Text Language Detector - Online Identify Language from Input
Paste text and detect its language (70+ languages) using a simple character n-gram model implemented in JavaScript. No server communication.
Poetry Meter Detector â Online Iambic, Trochaic, etc.
Paste a line of poem and see which syllable stresses create a particular meter. Educational tool.
Paraphrase Comparison Tool - Online Spot the Rewrite
Paste two versions of the same idea and see a wordâlevel diff highlighting the rewrite. Not AI, just diff.
Text Format Cleaner - Online Strip Rich Text & Homogenize
Paste rich text and clean it to plain text. Normalize line endings and whitespace. Prepare for code or databases.
Font Tech & Format Checker - Online Supports incremental font?
Detect browser support for fontâtech() and fontâformat() values in @fontâface src. Check COLRv1, variable, etc.
Proper Noun Highlighter - Online Identify Names, Places in Text
Paste text and quickly highlight potential proper nouns (capitalized sequences). Aid for editing or anonymization. Simple regex-based, local.
File Encoding Checker - Online Detect Text File Charset
Upload a text file to detect its character encoding (UTF-8, ISO-8859-1, etc.) and BOM presence. Runs entirely in your browser.
Korean Romanization Tool - Online Hangul to Latin
Type or paste Korean Hangul and see the revised romanization. Also works backwards for basic words. Study aid.
Slug Transliteration Tester - Online Latinize & Clean URLs
Test how nonâLatin characters (Chinese, Cyrillic, Arabic) convert to URLâsafe slugs with proper transliteration rules. Preview the final string.
Braille to Text Converter - Online Decode Dot Patterns
Enter Braille dot numbers (1â6) or paste Unicode Braille to decode into English text. Companion to textâtoâBraille.
RealâSample Contrast Checker - Online See Paragraph
See how a full paragraph looks with your chosen text and background colors. Not just a ratio; the real appearance.
CJK Text Line Break Tester - Online wordâbreak & lineâbreak
Test different lineâbreak and wordâbreak values on Chinese/Japanese/Korean text. See how browsers wrap. Essential for i18n.
ISBN Validator - Online Check ISBNâ10 & ISBNâ13
Validate ISBNâ10 and ISBNâ13 numbers and compute their check digits. Useful for booksellers and libraries. All local.
textâindent & hangingâpunctuation Demo - Online
Set up firstâline indentation and hanging punctuation. See how they affect reading flow. Copy the CSS.
Robots.txt Tester - Online Check URL Allow/Disallow
Enter a URL and a userâagent to see if it is allowed or blocked by the robots.txt file. Quick bot validation.
prefersâreducedâmotion Tester - Online A11y Check
Simulate reduced motion preference and test your animations. Copy the media query snippet. Keep your users safe.
Regex Lookaround Tester - Online Experiment with Lookahead
Practice positive/negative lookahead and lookbehind. See matches highlighted live. Master advanced regex.
Focus Order Analyzer - Online Tab Navigation Check
Enter a URL and extract tabâindex order violations and focusable elements. Quick accessibility audit. Clientâside fetch.
DNS Lookup - Online Domain Records Checker (A, MX, CNAME)
Query DNS records for any domain directly from your browser using DNS-over-HTTPS. See A, AAAA, MX, CNAME, and TXT records. No logs.
wordâbreak & overflowâwrap Playground - Online Text Wrapping
Compare breakâall, keepâall, and overflowâwrap: anywhere/breakâword. Paste long words and see how they wrap.
Alphabet Tracing Worksheet - Online Preschool Letter Practice
Generate customizable alphabet tracing sheets with uppercase and lowercase letters. Select letters to focus on. Instant print. Local only.
Pros & Cons List Maker - Online Decision Helper
Create a weighed pros and cons list with a score. Help make tough decisions. Data saved locally.
CSS Beautifier & Formatter - Online CSS Organizer
Beautify and format your CSS stylesheets instantly. Organize, minify, or prettify CSS code for better readability. Processed securely on client-side.
Tab Focus Order Checker - Online Visualize Tab Navigation Flow
Paste HTML and see the order in which elements would receive focus via Tab key. Highlight issues. Local accessibility testing.
Auto Caesar Cipher Decoder â Online Rot1â25 Try All
Paste an enciphered text and instantly see all 25 possible shifts. Highlight the most plausible.
Letter Formation Animator â Online Watch Handwrite Letters
Click a letter and watch an animated stroke order for print or cursive. Good for kids learning to write.
!important Remover - Online Clean Up Overqualified Rules
Paste your CSS and strip all `!important` declarations in one click. See a list of affected rules. Local tool.