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Popular PDF Tools by KR3 Tool
Add PDF Page Numbers
Alternate & Mix PDF
Bates Numbering PDF
Compress PDF
Create PDF Bookmarks
Crop PDF
Delete PDF Annotations
Delete PDF Pages
Deskew PDF
Edit PDF Metadata
Extract Images from PDF
Extract PDF Pages
Fill & Sign PDF
Flatten PDF
Grayscale PDF
Header & Footer PDF
HTML to PDF
JPG to PDF
Merge PDF
N-up PDF
OCR PDF
PDF Editor
PDF Page Numbers
PDF to Excel
PDF to JPG
PDF to PowerPoint
PDF to Text
PDF to Word
Protect PDF
Repair PDF
Resize PDF
Rotate PDF
Split PDF by bookmarks
Split PDF by pages
Split PDF by size
Split PDF by text
Split PDF in half
Unlock PDF
Visual Combine & Reorder PDF
Watermark PDF
Word to PDF

8 Hour Calculator

Time tracking tool to calculate 8-hour schedules.

ACT Composite Score Calculator

Estimate ACT composite scores quickly.

ADP Paycheck Calculator

Salary & tax estimator.

Amps to kW Calculator

Electrical power conversion tool.

Audiobook Calculator

Estimate listening time & chapters.

Audiobook Speed Calculator

Adjust playback speed & estimate time.

Bitcoin Mining Profitability

Estimate mining earnings & profitability.

Break Even Calculator

Calculate break-even point for products.

Body Fat Calculator

Estimate body fat percentage (male/female).

Calories Burned Calculator

Estimate calories burned while running.

CFT Calculator

Cubic feet (volume) converter.

Chipotle Nutrition Calculator

Calories & macros estimate for Chipotle menu items.

Compensation Calculator

Salary & benefits estimator.

Freelance Rate Calculator

Calculate hourly freelance rates.

General Calculator

Basic arithmetic & quick calculations.

GST Calculator (India)

GST rates & tax calculations for India (2025).

Home Loan Calculator

Loan EMI & amortization (Bangladesh focused).

Repiping Cost Calculator

Estimate plumbing repiping costs.

Insulin Calculator

Dosage & carb-ratio helper (informational only).

Neb Calculator

Nebulizer dosage guidance (informational).

NSQIP Risk Calculator

Surgical risk assessment tool.

Peptide Calculator

Mixing & concentration calculations.

Points Calculator

Track & calculate rewards points.

Pro Rata Calculator

Salary or payment prorating tool.

Productivity Calculator

Work efficiency measurement tool.

Profit Margin Calculator

Instant seller profit margin calculator.

Refill Calculator

Calculate next prescription refill dates.

Rent Vs Buy Calculator

Compare renting vs buying with taxes (2025).

Responsive Breakpoints Calculator

Find CSS breakpoints for responsive design.

Retirement Savings Calculator

Plan retirement savings & projections.

ROl Calculator

ROI for Google Ads & campaigns.

Row Echelon Calculator

Solve matrices to row echelon form.

Shell Method Calculator

Volume of solids of revolution (shell method).

Sig Fig Calculator

Significant figures rounding & counting tool.

Strength Calculator

Assess physical strength & fitness metrics.

Synology RAID Calculator

Estimate usable storage for RAID arrays.

Tablet Dosage Calculator

Weight-based tablet dosing for dogs (informational).

Time Zone Difference Calculator

Compare time zones around the world.

VPN Speed Test

Test your VPN or connection speed.

Word Counter

Count words, characters and estimate reading time.

Image to PDF Converter

Convert images into a single PDF file.

JPG to PNG

Convert JPG images to PNG format.

PNG to WebP Converter

Optimize images and convert to WebP.

PDF to Word

Convert PDF documents to editable Word files.

HEIC to JPG

Convert iPhone HEIC files to JPG (bulk).

PDF Compress

Reduce PDF file size for upload/sharing.

Merge PDF

Combine multiple PDFs into one file.

PDF to Text (OCR)

Extract text from scanned PDFs with OCR.

Remove Pages From PDF

Delete unwanted pages from PDF documents.

Merge MP3 Files

Combine audio files quickly and for free.

WebM to MP4

Fast video format conversion.

Image Watermark

Add or remove watermarks from images.

Favicon Generator

Create favicon from images or text fast.

Paraphrase Sentence

Quick paraphrasing for short sentences.

Plagiarism Checker

Check short text for plagiarism.

Hex to RGB Converter

Convert color codes between hex and RGB.

Generate Strong Password

Create secure passwords instantly.

WAV to MP3 Converter

Convert audio files quickly.

Coming Calculator

New calculator coming soon.

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How-to PDF Guides

How to edit PDF files

  1. Open a file in the Online PDF editor
  2. Click on the Text tool in the top menu
  3. Add text on the PDF page. Change text by clicking on existing text to start editing
  4. Add images to the page. Click and drag to move, resize or rotate the image
  5. Fill out PDF forms and add signatures. Draw, type or upload an image of your signature
  6. Annotate PDF pages, highlight text and mark changes with strikethrough
  7. Add new links to web URLs or pages in the document. Easily edit existing hyperlinks in the PDF
  8. Easily find and replace all occurrences of words in a PDF. Whiteout parts of the page. Add shapes
  9. Click Apply changes and download an edited document

Edit PDF files 

How to convert a PDF to Word

  1. Open your document with the PDF to Word converter
  2. Click Convert and download a Word document

PDF to DOC converter 

How to combine PDF files

  1. Open the Merge PDF files tool
  2. Drag to reorder the files, or sort them alphabetically
  3. Optionally select only a collection of pages to pick from each file
  4. Select your documents, or just drag and drop them all to the page
  5. Generate bookmarks or an outline based on the inputs
  6. Add file names to the footer of each page
  7. Generate a nice table of contents based on the documents being merged
  8. Optionally specify a cover / title page(s)
  9. Merge Acroforms or flatten form fields

Merge PDF files 

How to convert PDF to JPG

  1. Open your PDF with the PDF to JPG, PNG and TIFF converter
  2. Convert all pages or select only pages you want converted
  3. Select desired image format, PNG, TIFF or JPG
  4. Choose a higher resolution, 150 or 220
  5. Quickly convert a PDF page to PNG or JPG
  6. Download an archive with all the converted images

PDF to Image Converter 

How to delete pages from PDF

  1. Open the file with the Delete PDF Pages tool
  2. Click the pages you want to remove
  3. Download a new document, with the pages removed

Delete PDF Pages 

How to edit PDF on Mac

  1. Edit PDF files online in your Safari browser
  2. Download and install Sejda Desktop and edit PDF documents offline

Edit PDF offline with Sejda Desktop for Mac 

How to type on a PDF

  1. Open you file using the PDF editor
  2. Select the Text tool in the top menu
  3. Click anywhere on the page to start typing
  4. Fill out PDF forms easily, even if no form inputs are present
  5. Save and download your filled out document

Fill out PDF files 

How to password protect a PDF

  1. Open the Encrypt and Protect PDF tool
  2. Select your PDF document
  3. Choose a really strong password (16 characters or more recommended)
  4. Optionally, select a set of restrictions for your document: modifying, printing, copying text and graphics, etc
  5. Save and download your protected PDF

Protect PDF with password and restrictions 

How to compress a PDF/

How to reduce PDF file size

  • Open your document with the Compress PDF tool
  • Configure image quality and resolution. This controls how small your PDF will become
  • Compress and download your smaller PDF

Compress PDF online 

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