Guides
Step-by-step guides for problems people regularly write in about. Each one is tested on real files and links to the tool that does the job.
How to Reduce PDF Size for Government Portals (100 KB, 200 KB, 1 MB)
Why scanned PDFs get too big for Indian exam, scholarship and tax portals, and how to get them under 100 KB, 200 KB or 1 MB without making them unreadable.
How to Sign a PDF Without Printing It
Add a drawn, typed or uploaded signature to a PDF without printing or scanning, and learn when you need a DSC or Aadhaar eSign instead of a signature image.
How to Open and Convert iPhone HEIC Photos to JPG on Windows
Why iPhones save photos as HEIC, how to open them on Windows, how the Most Compatible setting stops it, and how to batch convert HEIC to JPG in a browser.
How to Compress a Video for WhatsApp Without Ruining It
How WhatsApp handles video in standard, HD and document mode, and how to choose resolution, bitrate and codec so your video sends quickly and still looks good.
Resize Photo and Signature for SSC, IBPS, UPSC and Other Exam Forms
Pixels, KB and DPI explained for Indian exam forms, typical SSC, IBPS, UPSC and NEET photo and signature sizes, and the mistakes that get uploads rejected.
How to Mask Aadhaar and Redact PDFs Properly
Why a black box drawn in a PDF viewer does not hide anything, how to use masked Aadhaar, and how to truly redact PAN, phone and account numbers before sharing.
How to Scan Documents to PDF with Your Phone
Get flat, readable, small PDF scans from your phone camera: lighting, angles, cropping, black and white versus colour, page order, file size and OCR.
How to Remove or Add a Password on a PDF
Open and permission passwords explained, how to remove a password you know from a bank statement PDF, how to add one before emailing, and what no tool can do.
How to Fix Blurry Scanned PDFs: Contrast, Thresholding, and DPI
Why phone scans and photocopied PDFs turn out faint, gray, or blurry, and the exact steps to restore clean, dark, printable text without re-scanning.
PDF DPI Explained: When to Use 150, 200, or 300 DPI for Official Uploads
A practical guide to DPI (dots per inch) in PDF documents: how it affects file size, print sharpness, and why portals require 200 or 300 DPI.
How AES-256 PDF Password Encryption Works: Security, Permissions & Risks
An in-depth explanation of user passwords, owner permissions, AES-128 vs AES-256 ciphers, and how to properly secure sensitive documents.
Audio Equalizer Frequency Guide: How to Fix Muddy Vocals, Boomy Bass & Harsh Treble
Learn what each frequency band (32 Hz to 16 kHz) controls in music, podcasts, and video audio, and how to apply practical EQ cuts and boosts.
H.264 vs VP9 vs AV1: Comparing Video Codecs for Web Streaming & Small File Sizes
An engineer's breakdown of H.264 (AVC), VP9, and AV1 video codecs: compression efficiency, hardware decoding support, and how to pick the right format.
How to Extract Text from Scanned PDFs & Photos with In-Browser OCR
Convert non-selectable scanned documents, photographed receipts, and book pages into editable text using client-side machine learning OCR.
How to Fix Distorted Audio, Normalize Volume & Boost Quiet Recordings Without Clipping
Understand digital clipping, inter-sample peaks, and headroom: how to boost whispering voices and quiet lectures without harsh crackling or distortion.
The Complete Guide to Merging PDF Documents Securely Without Adobe Acrobat
How to combine multiple PDF files, insert specific pages, and reorder document packets without paying for Adobe Acrobat subscriptions.
How to Convert Apple HEIC Photos to JPG on Windows & Android Without Losing Quality
Why iPhones save photos as HEIC files, why Windows and government forms reject them, and how to convert batches of HEIC photos to JPG locally.
How to Strip Hidden EXIF, Author & GPS Metadata from PDFs and Photos Before Sharing
Every file you create leaks hidden data: GPS coordinates, author names, software licenses, and camera models. Here is how to scrub metadata cleanly.
WhatsApp Status Video Limits: How to Post Full 1080p Clips Without Compression Blur
The complete technical breakdown of WhatsApp's 30-second Status limit, video compression algorithm, and how to preserve maximum sharpness.
Why Client-Side WebAssembly Processing is Safer Than Cloud Document Converters
An architectural explanation of client-side local computing vs cloud SaaS tools: data breach prevention, zero-upload guarantees, and verification.