Guides &amp; Tutorials

How to Create a security.txt File

Learn what security.txt contains, where to publish it and how to keep vulnerability reporting information current.

How to Build a Content Security Policy

Learn how CSP directives work and how to build a practical policy for a website.

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How to Prepare for an Interview: Questions, STAR Answers and Practical Tips

Learn how to prepare for general, HR, behavioral and technical interviews, use STAR answers and ask useful recruiter questions.

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Resume Analyzer & ATS Resume Checker

Check resume structure, readability and job-description keywords with deterministic browser-side analysis.

How to Write a Cover Letter That Fits the Job

Learn how to tailor a cover letter to a specific role using real experience, clear structure and relevant job terms.

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How to Build a Professional Resume That Works With ATS

Learn how to structure a clear, ATS-friendly resume and export it as a professional PDF with NeroTool.

How to Calculate Your Exact Age

Learn how age calculations work and how dates of birth translate into years, months, and days.

How to Record Audio Online and Save It as MP3

Learn how to record voice online, allow microphone access and save the result as an MP3 directly in your browser.

How to Compress Audio Online and Reduce MP3 Size

Learn how to compress audio online, reduce MP3 and WAV file size, choose a bitrate and balance audio quality against storage and upload limits.

How to Increase Audio Volume Online

Learn how to make quiet audio louder, choose a practical boost level and avoid clipping.

How to Trim an Audio File Online

Learn how to cut unwanted audio sections, choose precise start and end points and export a shorter audio clip.

How to Convert Audio Files Online: MP3, WAV, FLAC, OGG & M4A

Learn how to convert audio files online between MP3, WAV, FLAC, OGG and M4A. Understand formats, bitrate, quality and when to use an audio converter.

How to Convert AVI to MP4 Online

Convert AVI videos to MP4 in your browser with practical guidance on compatibility, codecs, quality, file size and local processing.

How to Convert AVIF to JPG Online

Learn when to convert AVIF to JPG, understand compatibility differences, and choose suitable image settings.

How to Encode and Decode Base64 Online

Learn what Base64 encoding is, when to use it, and how encoding and decoding work in web development.

How to Check Open Graph Tags Before Sharing a Page

Learn which Open Graph and Twitter Card fields to inspect and how to troubleshoot social sharing previews.

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How to Find and Replace Text Online

Learn how to replace repeated words and phrases, control case sensitivity, use whole-word matching and work with regular expressions.

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How to Clean Text Online and Remove Extra Spaces

Learn how to remove extra spaces, blank lines, tabs and duplicate lines from messy text while keeping useful structure.

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How to Convert Text Case Online

Convert text to uppercase, lowercase, title case or sentence case and choose the right capitalization style for your content.

Character Count: How to Check Text Length Online

Learn why character counts matter and how to measure text length for forms, writing, and content requirements.

HEX vs RGB vs HSL: A Practical Color Conversion Guide

Understand the most common color formats and convert between HEX, RGB and HSL values for CSS, design and development.

How to Crop an Image Online

Learn how image cropping works, when to crop before resizing, and how to prepare images for different layouts.

How to View and Remove EXIF Metadata from Photos

Understand EXIF metadata, what information it can contain and how to create a clean image copy before sharing it online.

How to Create a Website Favicon

Learn how to create a website favicon, which image sizes to use, and how to add it to your site.

How to Convert HEIC to JPG Online

Learn why HEIC images are converted to JPG, when conversion is useful, and how format compatibility affects photos.

How to Extract Text from a PDF

Learn how to extract selectable text from PDFs, handle scanned pages with OCR, and verify the result.

How to Reorder PDF Pages

Learn when to reorder pages, how to fix document sequences, and how to verify the final PDF.

How to OCR a PDF

Learn how OCR turns scanned PDF pages into searchable text and what affects recognition accuracy.

How to Combine Multiple JPG Images into a PDF

Learn how to combine JPG images into one PDF, arrange pages, and prepare a clean document for sharing.

How to Compress a Video Without Losing Too Much Quality

Learn how video compression works, which settings matter most, and how to shrink a video file online without ruining playback quality.

How to Compress Images Online Without Losing Quality

Learn how image compression works and how to reduce file size while preserving useful visual quality.

How to Convert JPG to PDF Online (Free)

Learn how to convert JPG images to PDF, arrange multiple images, and prepare a clean PDF document.

How to Convert a Multi-Page PDF to JPG Images

Learn how to convert a multi-page PDF to JPG images and handle each page as a separate image file.

How to Create a QR Code for Free

Learn how to create a QR code, what information it can contain, and how to make codes easy to scan.

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How to Extract Text from an Image Online

Learn how image text extraction works, what affects recognition accuracy, and how to prepare clearer images.

How to Reduce PDF Size for Email Attachments

Learn how to reduce PDF size for email, choose useful compression settings, and keep documents readable.

How to Convert Images Between JPG, PNG, WebP, AVIF and HEIC

Learn how image conversion works, how formats differ, and how to choose settings for quality and file size.

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How to Convert Images to PDF Online

Learn how to convert images to PDF, combine multiple images, and prepare files for sharing or archiving.

How to Add a Watermark to an Image Online

Learn how to add text watermarks to images, choose a position, and adjust opacity, size, color and rotation.

How to Convert JPG to PNG Online

Learn when to convert JPG to PNG, understand the differences between the formats, and preserve image quality.

How to Convert JPG to WebP Online

Learn when to convert JPG to WebP, how compression differs, and how WebP can reduce image file size.

JPG vs PNG vs WebP: Which to Compress To?

Compare JPG, PNG, and WebP compression to understand which format is best for quality, size, and web performance.

How to Format and Validate JSON Online

Learn how JSON formatting improves readability, how to spot syntax issues, and how to work with structured data.

How to Minify JSON Online

Learn what JSON minification does, when it is useful, and how to create compact JSON for web projects.

How to Make a Meme Online From Your Own Image

Learn how to create a simple meme from your own photo with draggable top and bottom text, then export it as PNG or JPG.

How to Convert MKV to MP4 Online

Learn how to convert MKV to MP4 online in your browser, with practical guidance on codecs, compatibility, quality, resolution and file size.

How to Convert MOV to MP4 Online

Convert MOV videos to MP4 in your browser with a practical guide to compatibility, quality, resolution and local processing.

How to Convert MP4 to MOV Online

Convert MP4 videos to MOV in your browser with guidance on compatibility, quality, codecs, editing workflows and local processing.

How to Convert MP4 to WebM Online

Learn how to convert MP4 videos to WebM, choose practical quality settings, understand browser compatibility and reduce unnecessary file size.

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How to Generate Strong Passwords Safely

Learn how strong passwords work, how to create them safely, and which password settings improve security.

How to Calculate Percentages Online

Learn how percentage calculations work and how to calculate increases, decreases, differences, and common percentages.

How to Convert PNG to JPG Online

Learn how to convert PNG to JPG, compare the formats, and choose the right settings for quality and file size.

How to Convert PNG to PDF Online

Learn how to convert PNG images to PDF, arrange multiple images, and prepare a document for sharing.

How to Scan and Decode a QR Code

Learn how QR code scanning works, what information QR codes can contain, and how to scan them safely.

How to Test Regular Expressions Online

Learn how regular expressions work, how to test patterns, and how to troubleshoot common matching problems.

How to Remove an Image Background Online

Learn how image background removal works, when to use transparent backgrounds, and how to improve the result.

How to Resize Images Online Without Losing Quality

Learn how image resizing works, how dimensions affect quality, and how to prepare images for different uses.

How to Upscale an Image Without Losing Quality

Learn how image upscaling works, when to use 2× or 4× enlargement, and how to keep results clean.

How to Rotate an Image Online

Learn how image rotation works, when to rotate before resizing, and how to prepare images for different layouts.

How to Create an XML Sitemap

Learn what XML sitemaps are, when websites need them, and how to prepare URLs for search engine crawling.

Unix Timestamp Converter: Seconds, Milliseconds and Dates

Learn how Unix epoch timestamps work and how to convert seconds or milliseconds into readable dates and back.

How to Encode and Decode URLs Online

Learn how URL encoding works, why special characters are encoded, and when URL decoding is needed.

How to Generate UUIDs Online

Learn what UUIDs are, where they are used, and how to generate unique identifiers for development and testing.

How to Convert a Video Online (MP4 and WebM)

Learn how browser-based video conversion works, which output format to pick, and how to convert a video between MP4 and WebM online for free.

How to Extract a Frame from a Video Online

Extract a still image from a video at an exact timestamp. This guide covers frame selection, PNG versus JPEG and practical quality tips.

How to Convert a Video to GIF Online

Turn a short video into an animated GIF in your browser. Learn when GIF is useful, how to choose a clip and how to keep the result manageable.

How to Convert a Video to MP3 Online

Learn how to convert a video to MP3, choose the right audio quality, preserve useful sound, and extract audio locally with NeroTool.

How to Convert WebM to MP4 Online

Learn how to convert WebM to MP4 in your browser, choose the right quality and resolution, and prepare videos for wider compatibility.

How to Convert WebP to JPG Online

Learn when to convert WebP to JPG, what changes between the formats, and how to balance compatibility and quality.

How to Convert WebP to PNG Online

Learn when to convert WebP to PNG, what changes between the formats, and how to preserve image quality.

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How to Count Words and Characters Online

Learn why word and character counts matter and how to measure text length for documents, forms, and online content.

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How to Sanitize an SVG Before Using It

Understand common SVG risks and how to remove scripts, event handlers and unsafe references before using an SVG.

How to Remove Metadata From an SVG

Learn what SVG metadata contains and how to clean authoring information locally.

How to Merge PDF Files for Free

Combine several PDF files into a single document for free, directly in your browser, with no upload and no software to install.

How to Split a PDF Into Separate Files

Split a large PDF into smaller documents by page range, for free, directly in your browser.

How to Rotate PDF Pages Online

Fix sideways or upside-down PDF pages by rotating them online, for free, in your browser.

How to Add a Watermark to a PDF

Add a text watermark to PDF pages online, for free, with control over placement, size, opacity and rotation.

How to Password Protect a PDF

Protect a PDF with a password online, for free, using browser-based encryption with no upload required.

How to Remove a Password From a PDF

Remove password protection from a PDF online, for free, when you already know the password.

How to Sign a PDF Document Online

Add a visible electronic signature to a PDF online, for free, by drawing, typing or uploading a signature.

How to Edit a PDF Online for Free

Add text, highlights and simple annotations to a PDF online, for free, directly in your browser.

How to Add Page Numbers to a PDF

Add page numbers to a PDF online, for free, with control over position, style and starting number.

How to Delete Pages From a PDF

Remove unwanted pages from a PDF online, for free, and download a clean copy in your browser.

How to Extract Pages From a PDF

Extract selected pages from a PDF online, for free, and save them as a new document.

How to Convert a PDF to Word

Convert a PDF to an editable Word document online, for free, directly in your browser.

How to Convert a PDF to Excel

Extract PDF text and tables into an Excel workbook online, for free, directly in your browser.

How to Convert a PDF to PowerPoint

Turn PDF pages into editable PowerPoint slides online, for free, directly in your browser.

How to Convert a PDF to PNG Images

Convert PDF pages to high-quality PNG images online, for free, directly in your browser.

How to Convert a Word Document to PDF

Convert a Word document to PDF online, for free, directly in your browser with a simple local workflow.

How to Remove Metadata from a PDF

Learn how to inspect and remove common PDF metadata before sharing a document.