Guides

Tool guides

Practical guides that explain everyday tool workflows, file fixes, conversions, image tasks, QR codes, subtitles, and more.

QR codesHow to create a QR code for a website

Learn what to check before creating a QR code for a website, flyer, menu, poster, or business card.

4 min read ImagesHow to compress images for websites

A practical checklist for reducing image file size while keeping pages sharp and usable.

4 min read SubtitlesSRT vs VTT subtitle files: what is the difference?

Understand when to use SRT or WebVTT, and how to convert subtitle files for different platforms.

4 min read SubtitlesHow to fix subtitles that are out of sync

Learn how subtitle timing drift happens and how to shift captions back into place.

4 min read ImagesWhat image metadata can reveal

A simple guide to EXIF, GPS, camera, software, and text metadata in images.

4 min read Text encodingHow to convert text and subtitle files to UTF-8

Fix broken characters by converting text or subtitle files to UTF-8 encoding.

4 min read Developer toolsHow to format JSON for debugging

Make JSON easier to read, validate, and copy while debugging APIs or config files.

4 min read CalculatorsHow to calculate GST from a total price

Understand how GST inclusive and exclusive amounts work before calculating tax values.

4 min read ImagesHow to resize images for social media posts

Resize images for social platforms without stretching, cropping important details, or creating oversized files.

4 min read QR codesHow to make a QR code menu for a restaurant

Create a menu QR code that is easy for customers to scan from tables, posters, flyers, or receipts.

4 min read Developer toolsHow to decode Base64 text safely

Understand what Base64 is, when to decode it, and what to check before using decoded output.

4 min read Text utilitiesHow to create a strong password

Learn what makes a password stronger and how to choose length, symbols, numbers, and casing.

4 min read CalculatorsHow to calculate age between two dates

Calculate age in years, months, days, and total days for birthdays, forms, records, and planning.

4 min read SEOHow to write better meta descriptions

Write search result descriptions that are clear, specific, and useful for visitors.

4 min read SEOHow to create a robots.txt file

Understand sitemap lines, allow rules, disallow rules, and common robots.txt mistakes.

4 min read Social mediaHow to generate better hashtags for social posts

Create hashtag sets that match the topic, platform, audience, and post style.

4 min read Social mediaHow to choose a good username

Generate username ideas that are readable, memorable, available, and suitable for profiles or projects.

4 min read SubtitlesHow to clean subtitle files before publishing

Remove messy subtitle formatting, speaker clutter, SDH notes, and spacing issues before sharing captions.

4 min read SubtitlesHow to turn subtitles into a clean transcript

Extract readable text from subtitle files for notes, articles, summaries, and republishing workflows.

4 min read ImagesJPEG vs PNG vs WebP: which image format should you use?

Compare JPEG, PNG, and WebP for photos, screenshots, transparency, file size, and website performance.

4 min read Developer toolsBase64 encoding vs encryption: what is the difference?

Understand why Base64 is useful for transport but should not be treated as secure encryption.

4 min read QR codesQR code not scanning? Common fixes that usually work

Fix QR codes that are too small, too low contrast, damaged, crowded, or pointing to a broken destination.

4 min read ImagesImage resize vs compression: which one do you need?

Learn when to resize image dimensions and when to compress file size for faster uploads and cleaner pages.

4 min read SEOMeta title vs meta description: what should each one do?

Compare page titles and meta descriptions so search snippets are clearer and more clickable.

4 min read SEORobots.txt vs noindex: which one should you use?

Understand the difference between blocking crawlers with robots.txt and asking search engines not to index a page.

4 min read Text utilitiesHow to convert EPUB to text

Extract readable text from EPUB ebooks for notes, summaries, research, editing, and plain text workflows.

4 min read Text utilitiesHow to read EPUB files online

Open EPUB files, browse ebook chapters, and preview readable text without installing a full ebook app.

4 min read Text utilitiesHow to convert text to EPUB

Turn plain text into a simple EPUB ebook with title, author, paragraph breaks, and a downloadable file.

4 min read PDF toolsHow to merge PDF files online

Combine multiple PDFs into one document, reorder files, and prepare a cleaner PDF for upload, printing, or sharing.

4 min read PDF toolsSplit PDF vs delete pages: which tool should you use?

Learn when to extract page ranges from a PDF and when to reorder or delete pages before downloading a rebuilt document.

4 min read PDF toolsJPG to PDF and PDF to JPG: choosing the right conversion

Convert images into PDF documents or render PDF pages as JPG and PNG images depending on your upload, print, or sharing workflow.

4 min read PDF toolsHow to watermark, number, and rotate PDF pages

Prepare PDFs for sharing by adding page numbers, draft watermarks, and fixing rotated pages before sending or uploading.

4 min read PDF toolsBest free PDF tools for everyday documents

A practical guide to choosing merge, split, compress, convert, metadata, watermark, page number, rotate, and text/signature PDF tools.

4 min read CalculatorsGuide to using GST Calculator

Learn when to use GST Calculator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read CalculatorsGuide to using Mortgage Calculator

Learn when to use Mortgage Calculator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read CalculatorsGuide to using Age Calculator

Learn when to use Age Calculator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read CalculatorsGuide to using Calorie Calculator

Learn when to use Calorie Calculator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read CalculatorsGuide to using Crypto Profit Calculator

Learn when to use Crypto Profit Calculator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read CalculatorsGuide to using Salary/Tax Calculator

Learn when to use Salary/Tax Calculator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Word Counter

Learn when to use Word Counter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Case Converter

Learn when to use Case Converter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Remove Duplicate Lines

Learn when to use Remove Duplicate Lines, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Text Sorter

Learn when to use Text Sorter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Markdown Previewer

Learn when to use Markdown Previewer, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Password Generator

Learn when to use Password Generator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Text File Viewer

Learn when to use Text File Viewer, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using EPUB Viewer

Learn when to use EPUB Viewer, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using EPUB to Text Converter

Learn when to use EPUB to Text Converter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read TextGuide to using Text to EPUB Converter

Learn when to use Text to EPUB Converter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using JSON Formatter

Learn when to use JSON Formatter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using Base64 Encoder/Decoder

Learn when to use Base64 Encoder/Decoder, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using Regex Tester

Learn when to use Regex Tester, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using Timestamp Converter

Learn when to use Timestamp Converter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using Color Picker

Learn when to use Color Picker, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using CSS Minifier

Learn when to use CSS Minifier, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using QR Code Generator

Learn when to use QR Code Generator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using QR Code Reader

Learn when to use QR Code Reader, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using HTML/CSS/JS Online Editor

Learn when to use HTML/CSS/JS Online Editor, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using JavaScript Playground

Learn when to use JavaScript Playground, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read DeveloperGuide to using SQL Runner

Learn when to use SQL Runner, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Image Compressor

Learn when to use Image Compressor, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Image Resizer

Learn when to use Image Resizer, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Image Format Converter

Learn when to use Image Format Converter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Image Cropper

Learn when to use Image Cropper, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Rotate/Flip Image

Learn when to use Rotate/Flip Image, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Strip Image Metadata

Learn when to use Strip Image Metadata, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Image Metadata Editor

Learn when to use Image Metadata Editor, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read ImagesGuide to using Image Color Picker

Learn when to use Image Color Picker, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using PDF Merge

Learn when to use PDF Merge, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using PDF Split / Extract Pages

Learn when to use PDF Split / Extract Pages, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

7 min read PDFGuide to using PDF Compress

Learn when to use PDF Compress, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using Images to PDF

Learn when to use Images to PDF, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using PDF to Images

Learn when to use PDF to Images, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using PDF to Text

Learn when to use PDF to Text, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using Text to PDF

Learn when to use Text to PDF, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using Markdown to PDF

Learn when to use Markdown to PDF, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using HTML to PDF

Learn when to use HTML to PDF, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using PDF Metadata Viewer

Learn when to use PDF Metadata Viewer, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using PDF Page Reorder / Delete Pages

Learn when to use PDF Page Reorder / Delete Pages, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

7 min read PDFGuide to using Add Page Numbers to PDF

Learn when to use Add Page Numbers to PDF, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

7 min read PDFGuide to using Watermark PDF

Learn when to use Watermark PDF, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using Rotate PDF Pages

Learn when to use Rotate PDF Pages, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read PDFGuide to using Visual PDF Editor

Learn when to use Visual PDF Editor, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

7 min read SubtitlesGuide to using Convert to SRT

Learn when to use Convert to SRT, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

7 min read SubtitlesGuide to using Convert to WebVTT

Learn when to use Convert to WebVTT, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

7 min read SubtitlesGuide to using Subtitle Shifter

Learn when to use Subtitle Shifter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using Partial Subtitle Shifter

Learn when to use Partial Subtitle Shifter, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using SRT Cleaner

Learn when to use SRT Cleaner, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using Convert to UTF-8

Learn when to use Convert to UTF-8, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using Online Subtitle Editor

Learn when to use Online Subtitle Editor, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using Subtitle Merger

Learn when to use Subtitle Merger, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using Subtitle to Plain Text

Learn when to use Subtitle to Plain Text, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

7 min read SubtitlesGuide to using Subtitle to PDF

Learn when to use Subtitle to PDF, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using Subtitle Color Changer

Learn when to use Subtitle Color Changer, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SubtitlesGuide to using Subtitle Position Changer

Learn when to use Subtitle Position Changer, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SEOGuide to using Meta Tag Generator

Learn when to use Meta Tag Generator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SEOGuide to using Robots.txt Generator

Learn when to use Robots.txt Generator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SEOGuide to using Open Graph Preview

Learn when to use Open Graph Preview, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SEOGuide to using Keyword Density Checker

Learn when to use Keyword Density Checker, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read StocksGuide to using Stock Screener

Learn when to use Stock Screener, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read StocksGuide to using Stock Chart

Learn when to use Stock Chart, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SocialGuide to using Instagram Bio Generator

Learn when to use Instagram Bio Generator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SocialGuide to using YouTube Title Ideas

Learn when to use YouTube Title Ideas, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SocialGuide to using Hashtag Generator

Learn when to use Hashtag Generator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read SocialGuide to using Username Generator

Learn when to use Username Generator, how to prepare your input, what settings to check, and how to avoid common mistakes before using the result.

6 min read