ToolNest Blog.
Clear, practical guides for working with images, PDFs, text and code. Learn the details, then put them into practice with free online tools.
Explore free tools →Learn something useful
Image GuidesHow to Compress Images Online Without Complicated Software
Learn how image compression works, when to choose JPEG or WebP, and how to reduce image sizes while keeping them useful.
Image GuidesJPG vs PNG vs WebP: Which Image Format Should You Use?
A practical comparison of JPG, PNG and WebP for photos, transparent graphics and website images.
Writing GuidesHow to Count Words and Characters in Text Online
Understand word counts, character limits, line counts and why different editors may report slightly different totals.
PDF GuidesHow to Merge PDF Files Online: A Practical Guide
Learn how to combine PDF documents, choose file order and check your final merged document.
PDF GuidesHow to Split a PDF and Extract Specific Pages
A simple guide to extracting PDF page ranges and creating smaller documents.
Developer GuidesJSON Formatter vs JSON Minifier: When to Use Each
Understand readable JSON, compact JSON and validation errors with practical examples.
Security GuidesHow to Create Strong Passwords and Avoid Common Mistakes
Practical advice for choosing strong unique passwords and using a password generator.
Image GuidesHow to Convert JPG to WebP for Website Images
Learn when WebP is useful and how to convert JPEG images without losing track of quality.
Writing GuidesHow to Remove Duplicate Lines and Clean Text Lists
Clean repeated entries, sort text lines and prepare lists for everyday workflows.
Calculator GuidesHow to Calculate Percentage Discounts and Savings
Learn the formula for percentage discounts and calculate final prices with worked examples.