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 — 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 →QR Code Generator
Generate a QR code from any text or URL. Download as PNG or SVG instantly.
Open QR Code Generator →AI Token Calculator
Paste any text and instantly see token count, context usage, and estimated cost for GPT, Claude & Gemini models.
Open AI Token Calculator →AI Prompt Improver
Score your AI prompt across 7 quality dimensions and get an improved version instantly.
Open AI Prompt Improver →Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. See the current epoch time live, with timezone support.
Open Unix Timestamp Converter →Markdown to PDF
Convert Markdown to a clean, printable PDF. No installs required.
Open Markdown to PDF →Username Generator
Generate unique usernames with style options and bulk generation.
Open Username Generator →Deep Link Tester
Test and debug deep links, Universal Links (iOS), and App Links (Android) directly in your browser.
Open Deep Link Tester →Password Generator
Generate strong, secure passwords with custom length and character options.
Open Password Generator →URL 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.