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From the ToolGuru desk

Guides and product notes will appear here as new tools ship.

Video editing timeline with transcript text and timed caption cues displayed beneath a video preview.
Content Creation, Video, and Accessibility

How to Add Captions to a Video: A Practical Guide to Subtitles, SRT Files, and Syncing

Learn how to add captions to a video with automatic transcription, SRT or WebVTT files, YouTube workflows, syncing, burned-in subtitles, translation, and quality checks.

5 min read

Diagram showing a video being trimmed and converted into an optimized looping GIF.
Images, Media, and Content Creation

How to Convert a Video to GIF: Trim, Resize, Optimize, and Choose the Right Format

Learn how to convert MP4 and other supported videos to GIF, trim clips, resize them, choose FPS, reduce file size, troubleshoot quality, and compare GIF, MP4, and WebP.

4 min read

Illustration of a phone, tablet, laptop, and desktop monitor recording their screens
Content Creation and Productivity

How to Screen Record on Android, iPhone, Windows, and Mac

Learn how to screen record on Android, iPhone, Windows 11, and Mac with built-in tools, including audio settings, capture areas, saved files, privacy, and troubleshooting.

6 min read

Diagram-style illustration of devices connecting to the internet through a VPN server and protected tunnel
Cybersecurity and Privacy

What Is a VPN? How It Works, What It Protects, and Its Limitations

Learn what a VPN is, how VPN routing and encryption work, what it protects, what it cannot protect against, and how to choose and use one safely.

8 min read

Illustration of a smartphone connecting wirelessly to earbuds, a keyboard, a fitness tracker, and a car system
Technology and Mobile Connectivity

How Does Bluetooth Work? Pairing, Range, Versions, Codecs, and Troubleshooting Explained

Learn how Bluetooth works, including pairing, bonding, profiles, range, codecs, multipoint, security, Bluetooth versions, and troubleshooting steps.

6 min read

Laptop and smartphone connecting through a network to remote cloud servers, storage, databases, and applications
Technology and Internet

What Is Cloud Computing? How It Works, Types, Benefits, Risks, and Examples

Learn what cloud computing is, how it works, and how cloud storage, SaaS, PaaS, IaaS, security, costs, backups, and deployment models fit together.

8 min read

Illustration of a smartphone tapping an NFC tag and reader to trigger payments, links, access, or automation.
Mobile Technology

What Is NFC? How Near Field Communication Works, Uses, Safety, and Troubleshooting

What is NFC? Learn how NFC works on phones, how tags and payments use it, whether it is safe, how to check compatibility, and how to fix common problems.

5 min read

A smartphone scanning a paper document and turning it into a multi-page PDF.
Documents, PDFs, and Mobile Technology

How to Scan a Document to PDF With Your Phone

Learn how to scan documents, receipts, forms, and notes to PDF on iPhone or Android, combine pages, use OCR, check quality, and share files safely.

5 min read

Generic smartphone showing storage being safely freed after reviewing photos, videos, downloads, apps, and attachments
Mobile Technology and Data Management

How to Free Up Phone Storage Safely on Android and iPhone

Learn how to free up phone storage safely on Android and iPhone by removing replaceable files, managing apps, reviewing attachments, and verifying photo backups first.

6 min read

Examples of an image resized proportionally, cropped to a square, and exported with transparency
Images and Media

How to Resize an Image Without Stretching, Blurring, or Losing Transparency

Learn how to resize an image without stretching, unnecessary blur, or lost transparency. Follow practical steps for websites, social media, email, documents, and print.

7 min read

Illustration showing a learner retrieving an answer from memory and reviewing the material again across spaced days
Education and Student Productivity

Active Recall and Spaced Repetition: How to Combine Them for Better Long-Term Learning

Learn how to combine active recall and spaced repetition into a sustainable study routine, create better questions, choose the right practice format, and avoid review backlogs.

7 min read

Diagram showing an AI application using MCP as a connection layer to reach external tools, documents, databases, and business services.
AI and Emerging Technology

What Is Model Context Protocol (MCP)? How It Works, Uses, Security, and Limitations

Learn what Model Context Protocol is, how MCP hosts, clients, and servers work, how tools differ from resources and prompts, and how to evaluate MCP safely.

4 min read