Koaris Tools
Fast, free, no sign-up tools for everyday web and marketing work — each one runs right in your browser.
URL Encoder & Decoder
Percent-encode text for safe URLs, or decode an encoded string back to readable text.
Open toolBase64 Encoder & Decoder
Encode text and images to Base64, or decode a Base64 string back to its original form.
Open toolHTML Text Encoder & Decoder
Turn special characters into HTML entities so they render literally — or decode entities back to text.
Open toolHTML Beautifier
Reindent and tidy messy or minified HTML so it is readable again.
Open toolPomodoro Timer
Focus in 25-minute blocks with short breaks, and track how many you complete.
Open toolQR Code Generator
Make a QR code for a link, text, Wi-Fi network, email, phone number, SMS or contact card, and download it as SVG or a high-resolution PNG.
Open toolWhatsApp Link Generator
Build a wa.me link that opens a chat with your number and an optional pre-filled message.
Open toolUTM Campaign URL Builder
Add consistent utm_source, utm_medium and utm_campaign tags to a link so analytics can attribute the traffic.
Open toolMailto Link Generator
Build a mailto: link with recipient, subject, body, CC and BCC already filled in.
Open toolImage Compressor
Shrink JPG, PNG, WebP or GIF images in your browser, one or many at once, and compare before downloading.
Open toolAdvertisement
Background Remover
Cut the background out of a photo in your browser and download it as a transparent PNG.
Open toolFavicon Generator
Turn one image or SVG into a complete favicon set, including a real multi-size favicon.ico, a maskable Android icon and the matching <head> markup.
Open toolSEO & GEO Analyzer
Enter a URL for weighted SEO and GEO diagnostics covering search, crawler access, and AI-readable structure.
Open toolCron Expression Generator
Build a cron schedule expression with a visual editor, or explain any existing cron string in plain English.
Open toolJSON Formatter & Validator
Pretty-print, validate, and minify JSON — with syntax coloring and instant error reporting.
Open toolPassword Generator
Generate strong, random passwords in your browser using cryptographic randomness — nothing is ever sent to a server.
Open toolColor Picker & Palette
Pick a color and convert it between HEX, RGB, and HSL — then generate complementary, triadic, or analogous palettes.
Open toolWord Counter
Count words, characters, sentences, and paragraphs — and see reading time — live as you type.
Open toolMarkdown to HTML
Convert Markdown to clean HTML and preview the rendered output — live, in your browser.
Open toolRegex Tester
Write a regular expression and test it against sample text live — with match highlighting, capture group labels, and flag toggles.
Open toolFree tools, professional results
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