When to Compress a PDF

Large PDF files are common when they contain high-resolution images or were exported from design software. Compressing reduces the file size making them easier to email, upload to portals, or share via messaging apps.

• ATO myTax portal has a 5MB file size limit for attachments
• Most email providers limit attachments to 10–25MB
• Medium compression typically reduces file size by 40–70%
• High compression may slightly reduce image quality inside the PDF

Which Image Format Should You Use?

• JPG — Best for photographs. Smaller file sizes but uses lossy compression.
• PNG — Best for logos, graphics, screenshots. Supports transparency (no background).
• WebP — Modern format used by websites. 25–35% smaller than JPG at same quality.

Why Compress Images?

Large images slow down websites, increase email bounce rates, and use unnecessary storage. Compressing images at 70–80% quality typically reduces file size by 50–70% with no visible quality difference to the human eye.

• Google PageSpeed recommends images under 100KB for web pages
• Social media platforms recompress uploaded images anyway — save bandwidth by compressing first
• Real estate listings, product photos, and profile pictures all benefit from compression

QR Code Uses for Australian Businesses

• Link business cards to your website or LinkedIn profile
• Add to invoices for quick payment link access
• Point restaurant menus to an online menu URL
• Share WiFi credentials with customers without saying the password aloud
• Link printed flyers to Google Maps, booking pages, or social profiles

Password Security Best Practices

• Use a minimum of 12 characters — 16+ is recommended for important accounts
• Never reuse passwords across multiple sites — use a password manager like Bitwarden or 1Password
• Enable two-factor authentication (2FA) on all important accounts especially banking and email
• Change passwords immediately if you suspect a data breach — check haveibeenpwned.com

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format used for storing and exchanging data. It is widely used in APIs, configuration files, and databases. Formatting makes it human-readable; validating ensures there are no syntax errors.

• Valid JSON requires double quotes around keys and string values
• Trailing commas are NOT allowed in standard JSON
• Common use: REST API responses, config files, data exports

About CSV Files

CSV (Comma-Separated Values) files are plain text files used to store tabular data. They are commonly exported from Excel, Google Sheets, bank statement downloads, and e-commerce platforms like Shopify.

• Australian banks (CBA, ANZ, Westpac, NAB) all support CSV transaction exports
• The ATO's myTax and most accounting software (Xero, MYOB) accept CSV imports
• CSV files can be opened in Microsoft Excel or Google Sheets for further analysis

Text Analysis Features

• Word count — Essential for blog posts, essays, and assignments with word limits
• Reading time — Calculated at 200 words per minute (average adult reading speed)
• Keyword density — Helps SEO writers check keyword usage without over-optimising
• Case converter — Quickly fix text that was typed in the wrong case

What is Base64?

Base64 is an encoding scheme that converts binary data into a text string using 64 characters. It is commonly used to embed images directly into HTML or CSS files, transmit binary data through text-based systems like email, and encode API authentication credentials.

• Base64 encoded data is approximately 33% larger than the original binary
• Commonly used in JWT (JSON Web Tokens) for authentication
• Used to embed small images directly in email templates