60+ Free Online Tools — No Signup, No Limits.
Every tool you need for text, code, images, PDFs, data files and calculations — fast, free and private. Most tools run entirely in your browser
Browse by Category
Nine categories, 60 tools — all one click away.
Text Tools
Count, clean, convert and transform text instantly.
12 tools →Developer Tools
Format, validate, minify, encode and generate code essentials.
12 tools →SEO Tools
Generate robots.txt, meta tags and .htaccess rules in seconds.
3 tools →Design & CSS Tools
Colors, gradients, shadows and accessibility helpers for designers.
6 tools →Image Tools
Compress, convert, resize, watermark and generate images.
8 tools →PDF & Document Tools
Merge, split and create PDFs, convert documents.
5 tools →Data Conversion Tools
Convert between CSV, JSON and Excel formats.
4 tools →Calculators
Age, BMI, loans, percentages, taxes and unit conversions.
8 tools →Security Tools
Check and generate strong passwords — all in your browser.
2 tools →Most Popular Tools
The tools our visitors reach for every day.
Password Generator
Create strong random passwords with custom length and characters.
Random Word Generator
Generate random words and sentences for prompts, games and testing.
Regex Tester
Test regex patterns with live highlighting and capture groups.
Text Reverser
Reverse characters, word order, or each line of your text.
UUID Generator
Generate one or many random v4 UUIDs / GUIDs instantly.
Case Converter
Switch text between upper, lower, title, sentence, camel and snake case.
JSON to CSV Converter
Flatten JSON arrays into downloadable CSV spreadsheets.
URL Encoder / Decoder
Percent-encode text for URLs or decode encoded URL strings.
All Tools
Everything on Nilon Tools, grouped by category.
📝 Text Tools
Word Counter
Count words, characters, sentences, paragraphs and reading time in real time.
Case Converter
Switch text between upper, lower, title, sentence, camel and snake case.
Text Reverser
Reverse characters, word order, or each line of your text.
Duplicate Line Remover
Strip repeated lines from lists and text while keeping the original order.
Whitespace Remover
Remove extra spaces, tabs, empty lines and unwanted line breaks.
Find & Replace
Search and replace text with plain matching or full regex support.
Text Diff Checker
Compare two blocks of text and highlight the differences line by line.
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences or words for your designs.
Slug Generator
Convert titles into clean, lowercase, hyphenated URL slugs.
Morse Code Converter
Translate text to Morse code and decode Morse back into text.
Text to Binary Converter
Convert text to and from binary, hexadecimal and ASCII codes.
Random Word Generator
Generate random words and sentences for prompts, games and testing.
👨💻 Developer Tools
JSON Formatter & Validator
Beautify, validate and minify JSON with clear error reporting.
JSON ↔ XML Converter
Convert between JSON and XML formats in both directions.
XML Formatter & Validator
Pretty-print, indent and validate XML documents.
Base64 Encoder / Decoder
Encode text to Base64 and decode Base64 strings back to text.
URL Encoder / Decoder
Percent-encode text for URLs or decode encoded URL strings.
HTML Entity Encoder / Decoder
Escape special characters to HTML entities and decode them back.
CSS Minifier
Compress CSS by removing comments, whitespace and redundancy.
JavaScript Minifier
Shrink JavaScript files by stripping comments and whitespace.
HTML Minifier
Compress HTML markup by collapsing whitespace and comments.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text.
UUID Generator
Generate one or many random v4 UUIDs / GUIDs instantly.
Regex Tester
Test regex patterns with live highlighting and capture groups.
📈 SEO Tools
Robots.txt Generator
Build a valid robots.txt with allow/disallow rules and sitemap.
Meta Tag Generator
Create SEO meta tags plus Open Graph and Twitter Card markup.
.htaccess Generator
Generate redirect, HTTPS, caching and security rules for Apache.
🎨 Design & CSS Tools
Color Converter
Convert any color between HEX, RGB and HSL with live preview.
Color Palette Generator
Build harmonious color schemes from any base color.
Gradient Generator
Design linear and radial gradients and copy the CSS code.
Contrast Checker
Test color pairs against WCAG AA/AAA accessibility standards.
Box Shadow Generator
Craft CSS box-shadow effects visually and copy the code.
Border Radius Generator
Visualize rounded corners and blob shapes, then copy the CSS.
🖼️ Image Tools
Image Compressor
Reduce image file size with adjustable quality settings.
Image Format Converter
Convert images between JPG, PNG and WEBP formats.
Image Resizer
Resize images to exact dimensions or by percentage.
Image to Base64
Turn images into Base64 data URIs for HTML and CSS embedding.
Favicon Generator
Create favicon packs in every needed size from one image.
Image Watermark Adder
Overlay text or logo watermarks with position and opacity control.
QR Code Generator
Create downloadable QR codes for links, text, WiFi and more.
Barcode Generator
Generate Code 128, EAN, UPC and other barcode formats.
📕 PDF & Document Tools
Images to PDF Converter
Combine multiple images into a single downloadable PDF.
PDF Merger
Combine multiple PDF files into one document.
PDF Splitter
Extract specific pages or ranges from a PDF into a new file.
TXT to PDF Converter
Turn plain text or .txt files into formatted PDF documents.
Markdown to HTML Converter
Convert Markdown syntax into clean HTML with live preview.
🔀 Data Conversion Tools
CSV to JSON Converter
Convert CSV data into JSON arrays or objects.
JSON to CSV Converter
Flatten JSON arrays into downloadable CSV spreadsheets.
Excel to CSV Converter
Convert Excel .xlsx spreadsheets into plain CSV files.
CSV to Excel Converter
Turn CSV files into formatted Excel .xlsx workbooks.
🧮 Calculators
Age Calculator
Work out exact age in years, months and days from any birth date.
BMI Calculator
Calculate Body Mass Index in metric or imperial units.
EMI Calculator
Calculate loan EMIs, total interest and payment breakdown.
Percentage Calculator
Solve any percentage problem: % of, ratio, increase and decrease.
Unit Converter
Convert length, weight, temperature and speed units instantly.
GST / VAT Calculator
Add or remove GST/VAT from prices at any tax rate.
Discount Calculator
Find sale prices, savings, markup and margin in seconds.
Interest Calculator
Calculate simple or compound interest and total returns.
🔒 Security Tools
Free Online Tools for Everyone — No Downloads, No Accounts
Nilon Tools is a growing collection of 60+ free, browser-based utilities designed to handle the small digital tasks that pop up every day. Instead of installing bulky software or handing your email address to yet another service, you simply open the tool you need, use it, and get on with your work. Every tool is free, unlimited, and works on any modern device — desktop, tablet or phone.
What Can You Do Here?
Writers and students use our word counter, case converter and diff checker to polish their documents. Developers rely on the JSON formatter, Base64 encoder, regex tester and code minifiers to debug and ship faster. Designers grab CSS from our gradient generator and box-shadow builder, and verify accessibility with the WCAG contrast checker.
Need to work with files? Compress and convert images, add watermarks, generate favicons and QR codes, merge or split PDFs, and convert between CSV, JSON and Excel — all from your browser. Our calculators cover everyday math: age, BMI, loan EMIs, percentages, taxes, discounts and compound interest.
Why Choose Nilon Tools?
- Privacy by design. Most tools process everything locally in your browser — your text and passwords never touch our servers. File tools delete uploads immediately after conversion.
- Genuinely free. No trial limits, no premium tiers, no forced signups.
- Fast and lightweight. Pages load in a blink — no heavy frameworks, no bloat.
- Dark mode included. Easy on the eyes, day or night, with your preference remembered.
Bookmark Nilon Tools and make it your go-to toolbox. Missing a tool you need? Tell us — we ship new tools all the time.