BlingCubby

Why BlingCubby?

BlingCubby is a free collection of browser-based web tools that require no sign-up or installation. All calculations, file processing, and conversions happen directly inside your browser — your data never leaves your device.

• No sign-up, no installation — start instantly
• 100% free — supported by non-intrusive ads
• Privacy-first — data processed locally in your browser
• Mobile-friendly — responsive design for any device
• 292+ tools across 8 categories

Popular Tools

• Percentage Calculator - Find what percentage a part is of a whole, or calculate a percentage of a value.
• Discount Calculator - Enter the original price and discount rate to find the final price and the amount saved.
• Date Difference Calculator - Calculate the number of days between two dates, or the date N days from a reference date.
• Character Counter - Count characters with and without spaces, and line count, in real time.
• Byte Counter - Calculate the byte length of text when stored as UTF-8.
• Text Compare - Compare two texts line by line to show added, removed, and identical lines.
• Emoji Picker - Click category-organized emoji — smileys, animals, food, travel — to copy instantly.
• Korean/English Typo Converter - Fix Korean text mistyped on an English keyboard layout, or vice versa.
• ASCII Art Generator - Convert text into ASCII art made of block characters.
• Invisible Character Detector - Find, show, and clean invisible characters like zero-width spaces, full-width spaces, and BOM.
• Image Resizer - Resize multiple images in the browser with aspect ratio kept, no server upload.
• Image Cropper - Enter pixel coordinates to crop just the area you need, in the browser.
• Image Rotate / Flip - Rotate images in 90-degree steps or flip them horizontally/vertically.
• Image Compressor - Reduce image file size in the browser by adjusting quality and max size.
• Favicon Generator - Generate multiple favicon and app-icon PNG sizes from a source image.
• Image Color Extractor - Analyze image pixels in the browser to extract the main color HEX codes.
• Image Watermark - Add a text or logo watermark over an image with adjustable position and opacity.
• Image Mosaic / Blur - Blur sensitive areas like faces, names, and addresses in photos/screenshots, in the browser.
• OG Image Generator - Generate a 1200×630 share image from a title, subtitle, and colors.
• SVG → PNG Converter - Render SVG code on Canvas and save it as a PNG image.
• File Size Converter - Convert Byte, KB, MB, GB, TB file size units on a 1000 or 1024 basis.
• YAML ↔ JSON Converter - Convert YAML and JSON data bidirectionally in the browser.
• Markdown → HTML Converter - Convert a Markdown document to HTML with a rendered preview.
• CSV ↔ JSON Converter - Convert CSV and JSON array data bidirectionally.
• Query String ↔ JSON Converter - Convert URL query strings and JSON objects bidirectionally.
• px ↔ rem Converter - Convert px and rem values bidirectionally based on a root font size.
• BMI Calculator - Calculate body mass index and a normal-weight range from height and weight.

Developer Tools

• JSON Formatter - Beautify or minify JSON strings instantly and check for validity errors.
• UUID Generator - Generate up to 20 cryptographically secure UUID v4 values at once.
• SQL Formatter - Neatly align SQL queries by keywords and clauses.
• HTML Formatter - Tidy HTML markup with consistent indentation and line breaks.
• CSS Formatter - Neatly align CSS code by rules and properties.
• Code Diff Tool - Compare two code or text inputs line by line to show additions and deletions.
• Cron Expression Generator - Generate a cron expression by combining minute, hour, day, month, and weekday values.
• HTTP Status Code Lookup - Quickly look up the name and meaning of an HTTP status code.
• cURL → fetch Converter - Convert a cURL command into JavaScript fetch code.
• .env Sorter - Sort keys in a .env file and find duplicate keys.
• package.json Viewer - Neatly organize scripts, dependencies, and devDependencies.
• semver Comparator - Compare two semantic versions and interpret version range notation.