Free Online Developer & Code Tools

Free, fast, and accurate online tools. No signup required.

All Calculators

Choose from our collection of free, accurate tools

Code Beautifier

Format and beautify messy code instantly. Supports JavaScript, HTML, CSS, JSON, XML, SQL, and Python with cus…

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Diff Checker

Compare two text blocks side by side and see differences highlighted. Perfect for code reviews and document c…

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Markdown Editor

Write and preview Markdown in real-time with syntax highlighting. Export to HTML or copy formatted output for…

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SQL Formatter

Format and beautify SQL queries with proper indentation and keyword highlighting. Supports MySQL, PostgreSQL,…

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JWT Decoder

Decode and inspect JWT tokens. View header, payload, and verify signatures. Essential for debugging API authe…

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Cron Expression Generator

Build cron expressions visually with plain-English descriptions. Preview next 5 execution times to verify you…

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UUID Generator

Generate UUID/GUID values in v1, v4, and v5 formats. Create single or bulk UUIDs for databases and applicatio…

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Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds with timezone sel…

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IP Address Lookup

Look up IP address geolocation, ISP, and network information. Check your own IP or look up any IP address.

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QR Code Generator

Generate QR codes from URLs, text, WiFi credentials, or contact cards. Download as PNG or SVG in custom sizes…

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UTM Link Builder

Build clean, properly encoded UTM tracking URLs in seconds — paste your destination URL, fill in your source,…

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Hashtag Generator & Counter

Turn any list of keywords into clean, grouped hashtags and instantly check your count against Instagram, Twit…

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Social Caption Character Counter

Paste your caption and instantly see character counts, word counts, and line counts checked against the exact…

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Engagement Rate Calculator

Calculate your social media engagement rate instantly using likes, comments, shares, and follower or reach co…

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Best Time to Post Planner

Find the best days and hours to post on Instagram, TikTok, LinkedIn, Twitter, Facebook, and YouTube with a co…

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Image Resizer for Social Platforms

Instantly crop and resize any image to exact pixel dimensions for Instagram, Facebook, Twitter, LinkedIn, You…

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Content Calendar Generator

Plan your entire month of social media posts in seconds — just pick your posting frequency and themes, and ge…

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Influencer Cost Estimator

Find out what a sponsored post should actually cost based on follower count, engagement rate, and platform — …

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CPM, CPC & ROAS Ad Calculator

Plug in your ad spend, impressions, clicks, and revenue to instantly calculate CPM, CPC, CTR, and ROAS — all …

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Emoji & Special Character Picker

Pick any emoji or special character instantly, or transform your text into bold, italic, script, and a dozen …

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A/B Headline Tester

Score two headlines side-by-side on length, power words, emotional sentiment, and clarity — then see which on…

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Bio Link Page Builder

Build a stunning link-in-bio landing page in minutes — customize colors, add buttons, and export a standalone…

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Simple Online Utility Tools for Everyday Tasks

Sometimes you just need a quick password for a new account, a QR code for your business card, a countdown timer for your presentation, or a random number to decide who goes first in a game. ToolShake is a curated collection of simple, no-nonsense utility tools that handle the small but frequent tasks of daily life without forcing you to download an app, create an account, or watch an advertisement before you can use the tool.

Every tool on ToolShake was born from a real moment of need. The Password Generator exists because cybersecurity experts say you should use a unique, strong password for every account — but creating them manually is tedious and people end up reusing the same three passwords everywhere. The QR Code Generator is here because sharing a URL by reading it out loud letter by letter is unreliable and frustrating. The Countdown Timer was built because the default phone timer does not let you name multiple simultaneous countdowns for different tasks.

Security and Privacy Tools

The Password Generator creates cryptographically strong passwords with customizable length from 8 to 128 characters, control over character types (uppercase, lowercase, numbers, symbols), and the ability to exclude visually ambiguous characters like lowercase L and uppercase I or zero and capital O. It generates passwords using the Web Crypto API directly in your browser — the generated password is never sent to any server, never logged, and never stored anywhere except your clipboard when you click the copy button. The UUID Generator creates version 4 universally unique identifiers using cryptographic randomness, formatted in the standard 8-4-4-4-12 hexadecimal format used in databases, APIs, and system integrations.

Random Generators for Decisions and Fun

The Random Number Generator produces integers or decimal numbers within any range you specify, with options for generating sets of unique numbers without repeats — perfect for lottery number selection, random sampling from a dataset, or choosing a random student from a class list. The Lorem Ipsum Generator creates placeholder text for design mockups, website prototypes, and document templates in selectable quantities by paragraph, sentence, or exact word count. The Color Palette Generator suggests harmonious color combinations based on color theory principles — complementary, analogous, triadic, or split-complementary — starting from any base color you choose.

QR Codes, Timers, and Productivity

The QR Code Generator converts any text, URL, email address, phone number, WiFi credentials, or vCard contact information into a downloadable QR code image in PNG or SVG format. You can customize the size, error correction level, and colors of the generated code. The Countdown Timer lets you create named timers for multiple events simultaneously — cooking, workouts, exam time, or meeting deadlines — with browser notifications when time expires even if the tab is in the background. The Stopwatch provides lap timing with millisecond precision for fitness tracking, speed tests, and time-based challenges.

Why Simple Tools Should Not Be Complicated

Most utility tool websites bury the actual functionality under paragraphs of SEO filler text, display multiple popup advertisements, require cookie consent interactions, and slow down the page with tracking scripts from a dozen analytics providers. By the time you find the actual input field and use the tool, you have wasted more time than the tool saves you. ToolShake puts the tool interface front and center — open the page, use the tool, get your result, close the tab. No interruptions, no distractions, no time wasted.

Our tools are also intentionally lightweight by design. Each one loads in under one second on any internet connection because they are built with minimal HTML and CSS, vanilla JavaScript without heavy frameworks, and zero third-party tracking scripts. The entire site weighs less than most single hero images on other utility tool websites.

Who Uses ToolShake Regularly

Marketing professionals generating QR codes for business cards, print materials, product packaging, and event posters. Software developers creating UUIDs for database records, generating test data, and producing random values for development and testing. Event planners setting countdown timers visible to audiences for product launches and conference sessions. Security-conscious individuals generating unique, strong passwords for every online account they create. Designers exploring color palette options for branding projects and website redesigns. Students and professionals using the Pomodoro timer for focused, distraction-free study and work sessions.

All tools on ToolShake are completely free, require no registration or login, and work perfectly on desktop, tablet, and mobile devices. Your data stays in your browser and is never collected or shared. Pick a tool from the list above and get the job done in seconds.

Why Use ToolShake?

Instant Results

All calculations happen in your browser — no waiting.

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100% Private

Your data never leaves your device.

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Accurate

Standard formulas with detailed explanations.

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Mobile Friendly

Works on phones, tablets, and desktops.

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