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Guides, tips, and how-tos for getting the most out of free online tools.
How to Create a Professional Invoice (Free Template)
Everything you need to know about invoicing: what to include, formatting tips, and a free invoice generator.
38 articles
How to Create a WiFi QR Code for Your Restaurant or Business
Learn how to create a QR code for your WiFi password so guests can connect instantly. Step-by-step guide for restaurants, cafes, Airbnbs, and small businesses.
How to Convert JSON to CSV (and Back)
Learn how to convert JSON to CSV and CSV to JSON. Covers nested objects, different delimiters, edge cases, and code examples.
How to Track Partial Payments on Invoices as a Freelancer
Record deposits, milestone payments, and partial settlements. See remaining balance and status at a glance.
Billable Expenses: How to Pass Through Costs to Your Clients
Mark expenses as billable, assign them to clients, and convert them into invoice line items automatically.
Retainer Billing for Freelancers: Monthly Invoicing with Overage Hours
Set up retainer projects with monthly fees, included hours, overage rates, and automatic invoice generation.
Writing Off Bad Debt: How Freelancers Handle Unpaid Invoices
When and how to write off unpaid invoices, partial write-offs, and the impact on your tax reports.
Payment Matching: Reconcile Bank Transfers with Invoices
Log incoming bank payments and match them to invoices. Keep your cash flow accurate without spreadsheets.
Unix Timestamp Explained: A Developer's Quick Reference
What is epoch time, why Unix timestamps matter, conversions in JS/Python/PHP, the Y2K38 problem, and when to use timestamps vs ISO dates.
How to File Your Dutch VAT Return (OB Aangifte)
Step-by-step guide to filing the OB Aangifte in the Netherlands — every box explained.
How to File Your German VAT Return (UStVA)
Step-by-step guide to filing the UStVA in Germany — every Kennzahl explained.
How to File Your French VAT Return (CA3)
Step-by-step guide to filing the CA3 in France — every cadre explained.
How to File Your Spanish VAT Return (Modelo 303)
Step-by-step guide to filing the Modelo 303 in Spain — every box explained.
How to File Your Italian VAT Return (LIPE)
Step-by-step guide to filing the LIPE in Italy — every VP field explained.
How to File Your Belgian VAT Return (BTW Aangifte)
Step-by-step guide to filing the BTW Aangifte in Belgium — every grid explained.
How to Convert Text Case Online — The Complete Guide
Learn about uppercase, lowercase, title case, camelCase, snake_case, kebab-case, and when to use each in writing and code.
What Is a Credit Note? When and How to Issue One
Learn what a credit note is, when to issue one, what to include, and how it differs from a refund.
Payment Reminders: When and How to Follow Up on Late Invoices
A timeline and templates for chasing late payments — friendly, firm, and final reminder approaches.
Annual Tax Report for Freelancers: Year-End Financial Summary Guide
How to prepare your annual tax report as a freelancer. Revenue summaries, expense categories, VAT reconciliation, and quarterly breakdowns.
Freelancer Dashboard: Your Complete Business Overview in One Place
Stop switching between spreadsheets, email, and bank apps. A freelancer dashboard shows revenue, unpaid invoices, VAT status, and deadlines.
Expense Tracking for Freelancers: Categories, VAT, and Quarterly Totals
How to track business expenses, reclaim input VAT, and generate quarterly summaries for your accountant.
How to Write Quotes and Estimates as a Freelancer
Quotes vs estimates vs proposals, what to include, validity periods, and converting accepted quotes to invoices.
Client Management for Freelancers: Organize Contacts, Rates, and History
Save client details, auto-fill invoices, and track per-client revenue without a full CRM.
How to Track Time and Bill Clients as a Freelancer
A practical guide to time tracking: timers, manual entry, hourly rates, and converting hours into invoices.
OSS vs IOSS Explained: Which EU VAT Scheme Do You Need?
The EU One Stop Shop and Import One Stop Shop cover different sales. This guide explains who needs OSS vs IOSS, the €10,000 threshold, registration steps, and filing deadlines.
EU OSS Registration Guide: Step-by-Step
How to register for the EU One Stop Shop. Step-by-step guide covering eligibility, required documents, registration process, and first quarterly return.
EU VAT for Etsy Sellers: What You Need to Know in 2026
Selling on Etsy, Gumroad, or Creative Market to EU buyers? Learn when Etsy collects VAT for you, when you still need to handle it, and the OSS threshold rules.
EU VAT Reverse Charge Invoice Template (Free)
Free reverse charge invoice template with correct legal text for EU B2B transactions. Includes Article 196 wording in English, German, French, Spanish, and Dutch.
EU OSS Threshold Explained: When Do You Need to Register?
Learn how the EU One Stop Shop works, when the €10,000 threshold applies, how to register, and how to file quarterly returns for cross-border digital sales.
How to Invoice EU Clients as a Non-EU Freelancer
What to include on invoices for EU clients: VAT numbers, reverse charge rules, mandatory fields, currency tips, and common mistakes that delay payments.
EU VAT Rates in 2026: A Complete Guide for Freelancers and Small Businesses
Complete EU VAT rates by country for 2026, including rate changes in Romania and Belgium. Covers reverse charge, cross-border invoicing, and OSS for freelancers.
IBAN vs SWIFT Code: What Freelancers Need to Know About International Payments
Learn the difference between IBAN and SWIFT/BIC codes, when you need each for international payments, and common mistakes that delay freelancer payouts.
How to Use Regex: A Beginner's Guide to Regular Expressions
Learn regular expressions from scratch — syntax, character classes, quantifiers, groups, flags, and real-world examples.
How to Create a Favicon for Your Website (All Sizes + Code)
Everything you need to know about favicons: recommended sizes, formats, HTML code, web app manifests, and testing tips.
How to Compress a PDF Without Losing Quality
Learn the best techniques to reduce PDF file size while keeping your documents sharp and readable.
5 Free Developer Tools Every Programmer Needs in 2026
Discover the essential free developer tools for formatting JSON, testing regex, encoding Base64, decoding JWTs, and comparing text diffs.
How to Create a Professional Invoice (Free Template)
Everything you need to know about invoicing: what to include, formatting tips, and a free invoice generator.
7 Best Free PDF Tools That Don't Upload Your Files (2026)
Compare the best free PDF tools that keep your files private. Merge, split, compress, and convert PDFs without uploading to any server.
How to Write a Privacy Policy for Your Website in 2026
A step-by-step guide to creating a GDPR and CCPA compliant privacy policy for your website or app.