Guides
Practical guides to help you get the most out of our tools. Each guide introduces a topic and links to the free tools you can use right away.
Finance
Personal Finance Basics: Calculators for Every Life Stage
From student loans to retirement — the financial calculators that help you plan ahead.
8 min readMortgage & Home Buying: A Calculator-Driven Guide
Understand mortgage math, compare loan offers, and budget for your home purchase with free calculators.
9 min readInvestment Returns & Compound Interest: The Complete Guide
Master compound interest, ROI, dividend yield, and systematic investing with free calculators.
9 min readFreelancer Income and Tax Guide: Keep More of What You Earn
Understand self-employment taxes, quarterly payments, deductible expenses, and how to set your freelance rate for profitability.
8 min readDebt Payoff Strategies: Snowball, Avalanche, and Beyond
Compare debt repayment methods and build a payoff plan that matches your financial situation and psychology.
9 min readRetirement Planning & the FIRE Movement: A Practical Guide
Learn how to plan for retirement and explore the FIRE movement with savings rate strategies, the 4% rule, and free calculators.
8 min readBusiness & Startup
SaaS Metrics That Matter: A Founder's Guide
MRR, churn, LTV, CAC — what they mean and why they matter for your startup.
7 min readSaaS Metrics Masterclass: The Numbers Every Founder Needs
Track MRR, churn, burn rate, and runway with free SaaS calculators built for founders and operators.
9 min readStartup Fundraising 101: From Cap Tables to SAFE Notes
Navigate pre-seed through Series A funding with practical tools for equity, dilution, and valuation decisions.
10 min readE-Commerce Pricing & Profit Margins: What Every Seller Needs to Know
Understand markup vs margin, calculate your true COGS, and choose pricing strategies that protect your profit using free calculators.
7 min readBusiness Pricing Models Compared: SaaS, Marketplace, Agency & Consulting
Compare pricing strategies across SaaS tiers, marketplace take rates, agency retainers, and consulting hourly rates to find the model that maximizes your revenue.
8 min readText Utilities
Working with Text: Tools for Writers and Developers
Word counts, JSON formatting, regex testing, encoding — the text tools you need.
6 min readText Encoding & Security: Base64, URL Encoding, and Hashing Explained
Understand and use text encoding, URL encoding, and hash generation with free online tools.
9 min readMarkdown Formatting Cheat Sheet: Syntax, Tips, and Common Patterns
Master Markdown syntax for headings, lists, links, images, code blocks, and tables with practical examples and formatting tips.
6 min readCSV and JSON Data Transformation: Converting, Cleaning, and Validating
Learn when to use CSV versus JSON, how to convert between them cleanly, and how to avoid common data transformation pitfalls.
7 min readUnit & Conversion
Unit Conversions You Actually Need
The everyday conversions for cooking, travel, fitness, and science.
5 min readUnit Conversion Tips and Tricks: A Practical Guide
Master everyday unit conversions with practical tips for metric, imperial, temperature, weight, and distance calculations.
7 min readCurrency Exchange for Travelers: Save Money on Every Trip
Learn how to get the best exchange rates, avoid hidden fees, and budget smartly for international travel.
8 min readDate, Time, and Timezone Calculations: A Practical Guide
Master date differences, timezone conversions, Unix timestamps, and daylight saving quirks with practical tools and clear explanations.
7 min readCreator & Social
The Social Media Toolkit: Free Tools for Creators
Optimize your social presence with hashtags, UTM tracking, QR codes, and SEO previews.
6 min readSocial Media Content Strategy: From Planning to Posting
Build a repeatable social media content strategy covering content pillars, engagement metrics, hashtags, repurposing, and posting schedules.
8 min readSEO Checklist for New Websites: Get Found on Google
A step-by-step technical SEO checklist covering meta tags, sitemaps, robots.txt, and on-page optimization for new sites.
7 min readInstagram and TikTok Growth: Strategies That Actually Work
Grow your Instagram and TikTok presence with practical strategies for hashtags, engagement rates, bio optimization, and platform-specific content tactics.
8 min readImage Tools
Image Optimization for the Web: A Practical Guide
Resize, compress, and convert images for faster pages and better SEO.
7 min readImage Editing & Optimization Workflow: Resize, Compress, Convert
Optimize images for web performance with free tools for resizing, compression, cropping, and format conversion.
9 min readColor Theory & Design Tools: Palettes, Contrast, and Conversions
Master color for web design with free tools for palette generation, contrast checking, and color conversion.
9 min readImage Formats Explained: PNG vs JPG vs WebP and When to Use Each
Understand the differences between PNG, JPG, WebP, and SVG image formats so you can choose the right one for web performance, quality, and transparency needs.
7 min readLegal & Documents
Legal Templates for Small Businesses: What You Need
The essential documents every small business needs — and when to hire a lawyer instead.
8 min readLegal Contracts for Freelancers: Templates That Protect Your Work
Essential contract templates and legal knowledge every freelancer needs to protect their work, get paid on time, and avoid disputes.
9 min readPrivacy Policy Compliance: GDPR, CCPA, and Cookie Consent Explained
Understand privacy policy requirements across major regulations and learn how to create compliant disclosures for your website or app.
8 min readSmall Business Legal Essentials: NDAs, Agreements, and Terms of Service
Understand the essential legal documents every small business needs, from NDAs and service agreements to terms of service and partnership contracts.
8 min readProductivity
Getting Things Done with Free Online Tools
Practical productivity methods and the free tools that make them work.
6 min readProject Management Calculators: Plan, Track, and Deliver
From timelines to risk assessment — free calculators to keep your projects on track.
9 min readTime Management Systems That Actually Work
Compare proven time management methods like Pomodoro, time blocking, and deep work to find the system that fits your workflow and helps you focus on what matters.
7 min readGoal Setting with OKRs: A Practical Framework for Results
Learn the OKR framework for setting ambitious objectives, defining measurable key results, running quarterly reviews, and cascading goals across teams.
7 min readResume Writing and Interview Prep: A Practical Playbook
Build a compelling resume with strong bullet points, prepare for interviews using the STAR method, and optimize your LinkedIn profile to attract opportunities.
8 min readDeveloper
Developer Utilities: The Browser-Based Toolkit
UUIDs, JWT debugging, hashing, cron expressions — the tools every developer bookmarks.
7 min readJSON & API Tools: The Developer's Browser-Based Toolkit
Format JSON, decode JWTs, generate UUIDs, and test regex — all from your browser with zero setup.
8 min readAPI Testing and Debugging: A Developer's Workflow Guide
A practical workflow for testing, debugging, and validating APIs using free browser-based tools.
9 min readPassword Security Best Practices: Generators, Hashing & 2FA
Learn how to create strong passwords, understand hashing algorithms like bcrypt and Argon2, and implement two-factor authentication to protect your accounts and applications.
7 min readWebsite Performance Audit Guide: Speed, Mobile & SSL Checks
Run a complete website performance audit covering page speed, mobile responsiveness, SSL security, and Core Web Vitals to improve user experience and search rankings.
7 min readMisc & Experimental
Health and Lifestyle Calculators: What the Numbers Mean
BMI, body fat, calories, and sleep — understand your health metrics and their limits.
6 min readCalorie and Macro Tracking for Beginners: A Practical Guide
Understand calories, macronutrients, and body composition to build a sustainable nutrition plan with free calculators.
9 min readAI Tools Cost Optimization: Track Tokens, APIs, and Hosting
Understand AI API pricing, estimate token costs, compare hosting options, and optimize your AI spending without sacrificing quality.
7 min readWedding and Event Budget Planning: A Complete Guide
Plan your wedding or event budget with realistic cost breakdowns, vendor negotiation tips, and strategies for splitting expenses without damaging relationships.
7 min readSleep, Fitness & Wellness: Tools for a Healthier Life
Optimize your sleep cycles, understand BMI and body composition metrics, track hydration, and use calculators to build sustainable health habits backed by science.
7 min readYouTube
Growing Your YouTube Channel: Free Tools and Strategies
Analytics, SEO, and planning tools to help you grow your YouTube channel.
7 min readYouTube SEO & Analytics: Data-Driven Channel Growth
Master YouTube search optimization, keyword research, and analytics to grow your channel with data-backed decisions.
9 min readYouTube Monetization and Earnings: What Creators Actually Make
Understand YouTube monetization from Partner Program requirements to CPM rates by niche, multiple revenue streams, and realistic earnings estimation.
8 min readYouTube Content Planning: A Workflow from Idea to Upload
Build a repeatable YouTube content workflow covering ideation, content calendars, scripting, upload checklists, and repurposing videos into Shorts.
7 min read