Tools
Free in-browser web tools for developers, writers and SEO work: generators, converters, formatters, encoders and calculators.
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Dice Roller (Roll Virtual Dice Online)
Free online dice roller. Pick the number of dice and sides, then roll d4, d6, d8, d10, d12, d20, or…
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CRC32 Checksum Calculator
Free online CRC32 calculator. Paste any text and get its CRC32 checksum in 8-digit hex and unsigned decimal, computed in…
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Coin Flip (Flip a Coin Online)
Flip a coin online for free. Get a fair, random heads or tails result, or flip many coins at once…
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Number Base Converter (Any Base 2 to 36)
Convert numbers between any base from 2 to 36 in your browser. Enter a value, pick a from-base and to-base,…
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Words to Tokens Estimator (LLM Token Counter)
Free words to tokens estimator. Paste text to count characters and words and estimate LLM tokens using the ~4 chars…
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GPU VRAM Calculator for Local LLMs
Estimate how much GPU VRAM a local LLM needs from its parameter count, quantization, and context length. Free in-browser calculator…
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UUID Validator (Check UUID Format and Version)
Free UUID validator. Paste a UUID to check the 8-4-4-4-12 format and read its version and variant. Runs in your…
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Twitter Card Generator (X Card Meta Tags)
Free Twitter Card generator. Build the twitter:card, twitter:title, twitter:description, twitter:image, and twitter:site meta tags for X in your browser.
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Schema Markup Generator (JSON-LD)
Free schema markup generator that builds valid JSON-LD structured data for Article, Organization, WebSite, and LocalBusiness pages right in your…
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Luhn Validator (Card Number Checksum)
Free Luhn validator to check if a card or account number passes the mod 10 checksum and detect the card…
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LLM API Cost Calculator
Free LLM API cost calculator. Enter input and output tokens, requests, and your provider's per-million token prices to see the…
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Canonical Tag Generator
Free canonical tag generator. Paste a page URL and get a clean, self-referencing rel=canonical link tag. Optional https and lowercase…
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Working Days Calculator (Business Days Between Dates)
Free business days calculator. Enter a start and end date to count the working days (Monday to Friday) and weekend…
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Random Username Generator
Generate random usernames in your browser. Pick a style, add numbers, and create a list of suggestions for games, forums,…
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Random Number Generator
Generate random integers in any range right in your browser. Set min, max, and count, with an option for unique…
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Morse Code Translator (Text to Morse and Back)
Free Morse code translator that converts text to Morse code and decodes Morse back to text instantly in your browser.…
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Meeting Time Zone Planner
Free meeting planner for time zones. Enter one meeting time and see the matching local time across major world cities,…
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HEX to Color Name (Nearest Named Color)
Convert any hex code to its nearest CSS named color with RGB and HSL values. Type a hex or pick…
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Cron Expression Generator
Free cron generator: pick a plain-English schedule and get a valid five-field cron expression with a description and field legend.…
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Color Palette Generator
Free color palette generator. Pick a base color and a harmony scheme to build a matching five-color palette with hex…
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Whitespace and Line Break Remover
Remove line breaks, extra spaces, tabs, and blank lines from text with five cleanup modes. Free in-browser tool, nothing you…
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Text Diff Checker (Compare Two Texts)
Free text diff checker that compares two texts line by line in your browser and marks every added, removed, and…
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Robots.txt Generator
Build a valid robots.txt file in your browser. Set the user-agent, allow or disallow paths, and add your sitemap. Free,…
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Open Graph Generator (og: Meta Tags)
Free Open Graph generator. Build og:title, og:description, og:image, og:url, and Twitter Card tags for social share previews. Runs in your…
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