Coder Design offers free services and tools for everyone.
String processing, code formatting, Unicode generators, SEO analysis, and more. No sign-up. No tracking. 100 % free and private.
Add custom prefixes and suffixes to each line of text instantly.
Convert text to aLtErNaTiNg CaSe instantly. Toggle uppercase or lowercase start.
Convert comma-separated lists into a clean single-column format.
Remove duplicate lines from text. Keep only unique entries.
Count lines, words, characters, and paragraphs in real time.
Strip special characters, symbols, and punctuation from text.
Remove all emojis and emoticons from text in one click.
Count emojis, characters, and words in any text instantly.
Find and count repeated words to improve your writing.
Split text by characters, words, sentences, or custom delimiter.
Merge multiple lines into one using any separator.
Repeat any text multiple times with optional separators.
Reverse text by characters, words, or lines.
Shorten text to a specific character or word limit.
Remove leading and trailing whitespace from every line.
Reverse the order of words in each line of text.
Remove specific words from your text instantly.
Find and replace specific words with multiple pairs at once.
Replace specific words with asterisks or custom characters.
Convert text to 𝐛𝐨𝐥𝐝 Unicode for social media and bios.
Convert text to 𝑖𝑡𝑎𝑙𝑖𝑐 Unicode for social media and bios.
Add u̲n̲d̲e̲r̲l̲i̲n̲e̲ using Unicode combining characters.
Cross out text with s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ Unicode.
Convert text to Ⓑⓤⓑⓑⓛⓔ circled Unicode letters.
Convert text to 𝒸𝓊𝓇𝓈𝒾𝓋ℯ Unicode script characters.
Convert text to ｗｉｄｅ fullwidth Unicode characters.
Convert text to ᵗⁱⁿʸ superscript Unicode characters.
Create c̷̛̗r̸̡̈ë̵̩e̸̹̎p̸̧̈y̶̜̕ Zalgo text with combining marks.
Remove Zalgo combining marks and clean corrupted text.
Browse and copy hundreds of special Unicode symbols.
Extract all URLs and email addresses from any text.
Format, validate, and beautify JSON with syntax highlighting.
Minify HTML, CSS, and JavaScript — remove whitespace and comments.
Test and debug regular expressions with live highlighted matches.
Explain what a regex does — get a readable breakdown of each part.
Encode or decode URLs and query string parameters.
Encode text to Base64 or decode Base64 strings with UTF-8 support.
Build clean Markdown tables from rows and columns in seconds.
Convert any title into a clean, SEO-friendly URL slug.
Preview how your site looks when shared on social media.
Coder Design offers a growing collection of free online utilities built for developers, content creators, marketers, and everyday users. Every tool runs entirely in your browser — your data never leaves your device.
Our text tools let you add prefixes and suffixes to lines, split and join text, remove duplicates, reverse words, censor content, and much more. Need to style text for social media? Use our Unicode generators for bold, italic, cursive, bubble, strikethrough, underline, tiny text, and Zalgo effects — all copy-paste ready.
For developers, we offer a JSON formatter & validator, regex tester with live highlighting, regex explainer, code minifier for HTML/CSS/JS, URL encoder/decoder, Base64 encoder/decoder, and a Markdown table generator.
No sign-up required. No cookies. No analytics tracking. 100 % free and private — every tool works offline once loaded and is optimised for mobile, tablet, and desktop.