Eisha Siddique
Eisha Siddique is the Managing Editor of theCoreiTech. Eisha reviews the Computer Software, Computer Security, and Web Tools guides, and writes about digital libraries, reading platforms, and content rights.
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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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Tools
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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