Tools That Make You More Productive
A growing collection of browser-based utilities built to help you work faster. Open a tool, get things done.
OnlineToolkit is a growing collection of browser-based utilities designed to help you work faster and smarter. Whether you're a developer, writer, or just someone who needs to get things done โ there's a tool here for you. Open it, use it, move on.
Privacy minded
Processing happens in your browser where possible. When a backend is required, your data is used only to fulfill the request and discarded immediately.
Learn while you work
Every tool page includes a plain-English explanation of how it works - not just what it does.
What If I Invested
See what your investment would be worth today with an animated historical chart.
Open What If I Invested โQR Code Generator
Generate a QR code from any text or URL. Download as PNG or SVG instantly.
Open QR Code Generator โAI Token Calculator
Paste any text and instantly see token count, context usage, and estimated cost for GPT, Claude & Gemini models.
Open AI Token Calculator โAI Prompt Improver
Score your AI prompt across 7 quality dimensions and get an improved version instantly.
Open AI Prompt Improver โUnix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. See the current epoch time live, with timezone support.
Open Unix Timestamp Converter โMarkdown to PDF
Convert Markdown to a clean, printable PDF. No installs required.
Open Markdown to PDF โUsername Generator
Generate unique usernames with style options and bulk generation.
Open Username Generator โDeep Link Tester
Test and debug deep links, Universal Links (iOS), and App Links (Android) directly in your browser.
Open Deep Link Tester โPassword Generator
Generate strong, secure passwords with custom length and character options.
Open Password Generator โURL Slug Generator
Convert any title into a clean, SEO-friendly URL slug.
Coming SoonCron Expression Generator
Build cron expressions visually and see the next scheduled run times in plain English.
Coming SoonJWT Decoder
Paste a JWT and instantly decode the header, payload, and expiry. Runs entirely in your browser.
Coming SoonBase64 Encoder / Decoder
Encode or decode Base64 text and files instantly, with URL-safe mode support.
Coming SoonLoan Calculator
Calculate monthly repayments, total interest, and see a full amortization schedule for any loan.
Coming SoonAge & Date Calculator
Calculate exact age or the number of days, weeks, and months between any two dates.
Coming SoonAI Privacy Policy Grader
Paste any privacy policy and get a structured risk score per category - data collection, third-party sharing, retention, and your deletion rights.
Coming SoonAI Readability Analyzer
Paste any text to get a grade-level score, sentence complexity breakdown, and specific rewrites for hard-to-read sections.
Coming SoonAI Salary Negotiation Coach
Enter your role, experience, and target salary to get a personalized negotiation script with anchoring tactics and objection responses.
Coming SoonFrequently Asked Questions
- Do I need to pay to use these tools?
- Most tools on OnlineToolkit are free to use. Some advanced features may require an account.
- Do I need to create an account?
- Most tools work without signing up or logging in. Some advanced tools may require an account to access.
- How often are new tools added?
- We add new tools regularly. Check back often or watch for the "New tools added regularly" notice on the homepage.
- Can I use these tools on mobile?
- Yes - every tool is designed to work on mobile, tablet, and desktop browsers.