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Merge PDF

Merge 2 or more PDF files into a single PDF file

PDF Tools

Compress PDF

Lessen the file size of a PDF file

PDF Tools

Split PDF

Extract pages from a PDF

PDF Tools

Rotate PDF

Rotate PDF pages by degrees

PDF Tools

Protect PDF

Add password protection to PDF

PDF Tools

Edit PDF

Edit text, add shapes, images, and signatures to your PDF

PDF Tools

Word to PDF

Convert Word documents to PDF

PDF Tools

PDF to Word

Convert PDF to Word documents

PDF Tools

JPG to PNG

Convert JPG/JPEG images to PNG format

Image Tools

Resize Image

Resize images by pixels or percentage

Image Tools

Compress Image

Reduce image file size with quality presets

Image Tools

Crop Image

Crop, rotate, and flip images easily

Image Tools

PNG to JPG

Convert PNG images to JPG/JPEG format

Image Tools

WebP to PNG

Convert WebP images to PNG format

Image Tools

Rotate Image

Rotate images by any angle

Image Tools

Flip Image

Flip images horizontally or vertically

Image Tools

URL QR Code

Generate QR codes for website links

QR Tools

Text QR Code

Create QR codes for plain text

QR Tools

Email QR Code

Generate email QR codes

QR Tools

WiFi QR Code

Share WiFi credentials easily

QR Tools

Phone QR Code

Create phone number QR codes

QR Tools

SMS QR Code

Generate SMS message QR codes

QR Tools

Location QR Code

Share GPS coordinates

QR Tools

Calendar Event QR Code

Create iCal/vCal event QR codes

QR Tools

Tank Volume Calculator

Calculate volume of vertical cylindrical tanks

Calculators

Pipe Flow Rate

Calculate flow rate through pipes

Calculators

API Gravity Converter

Convert between API gravity and specific gravity

Calculators

Tank Filling Time

Calculate how long it takes to fill a tank

Calculators

Hydrostatic Pressure

Calculate pressure at depth in fluids

Calculators

Ideal Gas Law

Calculate ideal gas properties

Calculators

Pipe Wall Thickness

Calculate pipe wall thickness (ASME)

Calculators

Heat Exchanger LMTD

Calculate heat exchanger log mean temperature difference

Calculators

JSON Formatter

Format and validate JSON data

Dev Tools

SQL Formatter

Format SQL queries for readability

Dev Tools

Code Diff Checker

Compare code and find differences

Dev Tools

Regex Tester

Test regular expressions against text

Dev Tools

JWT Debugger

Decode and verify JWT tokens

Dev Tools

Hash Generator

Generate cryptographic hashes

Dev Tools

YAML to JSON Converter

Convert YAML to JSON format

Dev Tools

cURL to Code

Convert cURL to Python/JS/Go

Dev Tools

Everything You Need, One Platform

From calculations to document processing, QR generation to professional calibration

100+ Calculators

Financial, scientific, conversion, and specialized calculators for every need

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20+ PDF Tools

Merge, split, compress, convert, and manipulate PDFs with ease

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15+ Dev Tools

Formatters, converters, encoders, and generators for developers

Open Dev Tools
100% FREE

QR Generator

Create custom QR codes with logos, colors, and batch generation

Create QR Codes
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PREMIUM FEATURE

Professional Tank Calibration

Generate accurate calibration charts and professional PDF certificates for fuel storage tanks with industry-standard dry and wet calibration methods.

  • Dry & wet calibration methods
  • Professional PDF certificates with branding
  • Support for all tank types (cylindrical, rectangular, elliptical)
  • Complete calibration history and management
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Sample Calibration Chart
Professional Output
100+
Calculators
20+
PDF Tools
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QR Codes
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  • 100+ Calculators
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Premium

$4.99/mo
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  • QR Batch & Projects
  • PDF Dashboard
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Calibration

$6.99/mo
  • Everything in Free
  • Tank Calibration
  • PDF Certificates
Start Calibration

Complete

$11.99/mo
  • Everything in Premium
  • Tank Calibration
  • Custom Branding
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