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Instant Utility Tools for Everyone

A blazing fast, minimalist collection of free online tools. Text formatters, developer utilities, image converters and more all running in your browser with zero data shared.

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Featured Tools

Count words, characters, sentences and paragraphs instantly.

Character Counter

Count characters in your text with and without spaces.

Uppercase Converter

Convert any text to UPPERCASE in one click.

Lowercase Converter

Convert any text to lowercase instantly.

Remove Line Breaks

Clean up text by removing extra line breaks and newlines.

Remove Duplicate Lines

Find and remove repeated lines from any block of text.

Popular Guides

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Resize Image for Instagram

Instagram feed posts display best at 1080×1080 pixels for square posts. Uploading oversized photos slows posting and may get compressed unpredictably.

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Resize Image for YouTube Thumbnail

YouTube recommends 1280×720 pixels (16:9) for custom thumbnails. This size looks sharp on all devices and meets platform requirements.

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Resize Image for LinkedIn Banner

A professional LinkedIn banner is 1584×396 pixels. Crop or resize your image to this wide format for the best result.

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Resize Image for Twitter/X Header

X profile headers display at 1500×500 pixels on desktop. Resize your image to this ratio before uploading.

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Resize Image for Facebook Cover

Facebook cover photos are 820×312 pixels on desktop. Mobile crops differently keep key content centered.

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Resize Image for TikTok Cover

TikTok uses a 9:16 vertical format. For cover and story-style assets, 1080×1920 is the standard full-screen size.

Text Tools

Count words, characters, sentences and paragraphs instantly.

Character Counter

Count characters in your text with and without spaces.

Uppercase Converter

Convert any text to UPPERCASE in one click.

Lowercase Converter

Convert any text to lowercase instantly.

Remove Line Breaks

Clean up text by removing extra line breaks and newlines.

Remove Duplicate Lines

Find and remove repeated lines from any block of text.

Count the number of lines in any block of text.

Sort lines of text alphabetically, numerically, or in reverse.

Developer Tools

Beautify and format minified JSON instantly.

Validate JSON and get a clear error message if it is invalid.

Base64 Encode / Decode

Encode text to Base64 or decode Base64 strings instantly.

URL Encoder / Decoder

Encode or decode URL components and query strings.

Minify HTML to reduce file size and improve load times.

Timestamp Converter

Convert Unix timestamps to human-readable dates and back.

Test and debug regular expressions with live match highlighting.

Pick colors and convert between HEX, RGB, and HSL formats.

Image Tools

Resize images to any dimension right in your browser.

Convert images to and from WebP format in your browser.

Compress JPEG images to reduce file size without visible quality loss.

Crop images to a precise size or free-form selection.

Favicon Generator

Generate a favicon.ico and PNG icons from any image.

Aspect Ratio Checker

Calculate and check the aspect ratio of any image or dimensions.

Image Dimension Checker

Check the exact pixel dimensions and file size of any image.

Time & Productivity

Calculate exact age from a date of birth in years, months and days.

Date Difference Calculator

Calculate the exact number of days between two dates.

Countdown Timer

Set a countdown timer for any duration with an alert when it reaches zero.

Boost focus with the classic 25-minute Pomodoro work cycle.

Work Hours Calculator

Calculate total work hours from start and end times across multiple days.

Business Days Calculator

Count working days between two dates, excluding weekends.

Time Zone Converter

Convert times between any two time zones worldwide.

Study Tools

Calculate your GPA from course grades and credit hours.

Percentage Calculator

Calculate percentages, percentage changes, and what percent X is of Y.

Pick a random item from a list for decisions, giveaways, or team sorting.

Citation Formatter

Format citations in APA, MLA, Chicago, and Harvard styles.

Attendance Calculator

Calculate attendance percentage and minimum attendance needed.

File Conversion

Convert a JPG image to ICO (favicon) format.

Minify and clean up SVG files to reduce their size.

Image to Favicon

Convert any PNG, JPG, or SVG to a complete favicon set.

Convert JSON arrays to CSV for Excel and spreadsheets.

Convert CSV files to JSON arrays instantly.

Markdown to HTML

Convert Markdown to clean HTML instantly.

Convert WebP images to JPG format in your browser.

Convert JPEG images to PNG format in your browser.

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Best Study Tools for College Students in 2026

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Why Use ToolKits?

In a world full of bloated, ad-heavy utility websites, ToolKits was built with one goal: to provide the fastest, cleanest experience possible. Every tool runs client-side in your browser your data never leaves your device.

Built for Developers and Creators

Whether you are a developer decoding a Base64 string, a writer counting words for an article, or a student calculating a GPA our minimalist toolset gets the job done instantly, without ads in your face or paywalls in your way.

Privacy by Design

Because all processing happens in your browser, sensitive content API keys, private documents, personal data stays on your machine. We do not log your inputs. We do not store your files.

ToolKits Free Online Utility Tools