Developer Tools
Format, convert, encode and generate developer-focused utilities.
Explore the Developer Tools collection
56 browser-based tools
Your all-in-one toolbox for everyday online tasks.
Convert, generate, edit, optimize, and analyze in seconds. OnlineToolkit helps you get work done with no installation and no friction.
Find a tool instantly
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56 tools available across 5 categories.
Popular categories
Browse tools grouped by what you need to solve.
Text Tools
Compare and clean text quickly for better readability.
Explore the Text Tools collection
Security Tools
Generate and handle secure values for daily use.
Explore the Security Tools collection
Calculators
Simple calculators for common everyday calculations.
Explore the Calculators collection
Document Tools
Convert, transform, and manipulate document files.
Explore the Document Tools collection
Featured tools
Browse tools from your current catalog data.
Developer Tools
JSON Formatter / Beautifier
Format and beautify JSON instantly with proper indentation.
Launch JSON Formatter / Beautifier
Text Tools
Case Converter
Convert text into UPPERCASE, lowercase, Title Case, sentence case, camelCase, PascalCase, or snake_case.
Launch Case Converter
Text Tools
Word & Character Counter
Count words, characters (with and without spaces), lines, and paragraphs as you type.
Launch Word & Character Counter
Text Tools
Text Sorter
Sort lines alphabetically or numerically with optional case sensitivity and duplicate removal.
Launch Text Sorter
Text Tools
Find & Replace Text
Find and replace text using plain matching or regular expressions.
Launch Find & Replace Text
Security Tools
Strong Password Generator
Generate strong random passwords with customizable character rules.
Launch Strong Password Generator
Security Tools
Password Strength Checker
Analyze password strength with scoring, entropy estimate, breach-risk heuristics, and improvement suggestions.
Launch Password Strength Checker
Calculators
SIP Calculator
Calculate SIP growth with compound returns over time.
Launch SIP Calculator
Calculators
EMI Calculator
Calculate your monthly EMI, total interest, and total loan repayment.
Launch EMI Calculator
Developer Tools
UTM Builder
Generate trackable campaign URLs with UTM parameters and ready-to-copy output.
Launch UTM Builder
Document Tools
PDF to Image Converter
Convert PDF pages to JPG, PNG, or WEBP images directly in your browser. No upload required.
Launch PDF to Image Converter
Lightning fast
Tools open in seconds with optimized client-side performance.
Privacy first
Most utilities run in your browser, keeping your data with you.
No signup needed
Use essential tools instantly without creating an account.
Always improving
New tools and upgrades are shipped continuously.
Build faster with the right tools at your fingertips.
Save your favorites, discover new categories, and streamline your daily workflow.
Frequently asked questions
Quick answers about using OnlineToolkit.
OnlineToolkit is a collection of free, fast browser utilities for text, developers, security, and everyday calculations. Open a tool, use it immediately, and leave when you are done.
No. The tools are available without signup. Your session stays in the browser for most utilities, so you can start working right away.
Most tools process input locally in your browser. We do not use your pasted text or files for training, and nothing is stored on our servers for typical client-side tools.
You need a network connection the first time you load a page. After that, many tools continue to work with cached assets until you refresh or clear site data.
Yes. OnlineToolkit is free to use. There are no paywalls for the utilities listed in the catalog.
Browse by category from the Categories page, open the full Tools directory, or use the search on the homepage and tools page to filter by name or description.
Use a current version of Chrome, Firefox, Safari, or Edge. Tools rely on modern JavaScript; very old browsers may not work correctly.
Yes. Copy the output from any tool and paste it into another-for example, format JSON, then convert or diff it in a follow-up step.
We ship improvements and new utilities regularly. Each tool page reflects the latest behavior when you load the site.
OnlineToolkit is built for interactive use in the browser. There is no public HTTP API; integrate by linking to the tools you need.
Check that your input matches the expected format-for example valid JSON for a formatter. Error messages usually point to the line or rule that failed.
Some tools keep your latest input in browser local storage for convenience. You can clear inputs anytime, and browser data can be removed from site settings.