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  1. How to Open RAR, 7z and TAR.GZ Files Without Installing Anything

    · 2 min read

    Got a .rar, .7z or .tar.gz file and no program to open it? See what's inside and extract the files you need in your browser, on any computer or phone.

  2. How to Extract the Audio From a Video as MP3 or M4A

    · 3 min read

    Save the sound of a video (a lecture, an interview, a song you recorded) as MP3, M4A, WAV or OGG, choose the right quality, and trim it to the part you need.

  3. How to Sign a PDF Without Printing It

    · 3 min read

    Add your signature and the date to a PDF by drawing, typing or using a picture of your signature, then send it back in minutes, no printer or scanner needed.

  4. How to Resize a Photo to an Exact Size for Online Forms

    · 3 min read

    Application forms ask for photos in exact pixels and under a size limit in KB. Here is how to crop, resize and compress a photo so it is accepted the first time.

  5. Regular Expressions for Beginners: A Practical Regex Cheat Sheet

    · 3 min read

    Learn the regex building blocks (characters, classes, quantifiers, anchors, groups) with practical examples you can test live, from emails to dates to log files.

  6. Word and Character Limits: Essays, Bios, Posts and Meta Tags

    · 2 min read

    Count words and characters accurately, understand why counts differ between tools, and fit essays, applications, bios and posts within their limits.

  7. How Loan EMI Is Calculated (and How Prepayments Save Interest)

    · 2 min read

    The EMI formula in plain words, why early payments are mostly interest, how an amortization schedule works, and how extra payments shorten a loan.

  8. Remove Background Noise From Voice Recordings and Videos

    · 3 min read

    Clean up fan noise, hum, hiss and traffic from voice notes, interviews and videos, choose how much to remove, and record cleaner audio next time.

  9. How to Split a PDF or Save Only Some of Its Pages

    · 3 min read

    Divide a long PDF into chapters, save each page separately, or extract just the pages you need, without losing quality or uploading the file.

  10. Remove GPS Location and EXIF Data From Photos Before Sharing

    · 3 min read

    Photos can reveal where you live, which phone you use and when you were there. See what EXIF data contains and how to remove it without losing quality.

  11. Trim a Video or Cut Out Parts Without Losing Quality

    · 3 min read

    Cut the start and end off a video, keep several clips, or remove the boring middle. Learn the difference between fast and exact cuts and when each is best.

  12. Compress a PDF to Send by Email or Upload to a Portal

    · 3 min read

    PDF too large to attach or upload? Learn why PDFs get big, how to shrink them without blurring the text, and what to do when compression isn't enough.

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