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Compress images, merge PDFs, format JSON and work out UK tax. Everything runs on your device, so nothing is uploaded.

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Popular tools

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Aa

Word Counter

Count words, characters, sentences, paragraphs and reading time as you type.

Zip

Image Compressor

Compress JPG, PNG and WEBP images without visible quality loss.

{}

JSON Formatter & Validator

Format, beautify, validate and minify JSON with clear error messages.

PDF+

Merge PDF Files

Combine multiple PDFs into one document, privately in your browser.

VAT

VAT Calculator (UK)

Add or remove UK VAT at 20%, 5% or 0% in one step.

£net

UK Take-Home Pay Calculator

Estimate income tax, National Insurance and take-home pay for 2026/27.

QR

QR Code Generator

Create free QR codes for links, text, Wi-Fi and contact details.

***

Strong Password Generator

Create secure random passwords using your browser's crypto engine.

%

Percentage Calculator

Find percentages, percentage change and what percent one number is of another.

aA

Case Converter

Convert text to UPPER, lower, Title, Sentence, camelCase, snake_case and more.

#

Character Counter

Check text length against X, Instagram, SMS, meta title and meta description limits.

Li

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences or words for mock-ups.

𝓐

Fancy Text Generator

Create bold, italic, script and bubble text for bios and posts.

→,

JSON to CSV Converter

Convert a JSON array of objects into CSV for Excel or Google Sheets.

B64

Base64 Encode & Decode

Encode text to Base64 or decode Base64 back to text, with UTF-8 support.

.*

Regex Tester

Test regular expressions live with match highlighting and capture groups.

ts

Unix Timestamp Converter

Convert Unix epoch time to a readable date and back.

MD

Markdown to HTML Converter

Convert Markdown to clean HTML with a live preview.

◐

Color Converter (HEX, RGB, HSL)

Convert colours between HEX, RGB and HSL with a live swatch.

↔

Image Resizer

Resize images to exact pixel dimensions or a percentage.

Im→PDF

Images to PDF Converter

Convert JPG, PNG and WEBP images into one PDF.

SDLT

Stamp Duty Calculator (SDLT)

Calculate stamp duty land tax for homes in England and Northern Ireland.

Mtg

Mortgage Calculator (UK)

Estimate monthly mortgage repayments and total interest.

CI

Compound Interest Calculator

See how savings and investments grow with compound interest.

BMI

BMI Calculator

Calculate body mass index with metric or imperial units.

Age

Age Calculator

Calculate exact age in years, months and days from a date of birth.

Δd

Date Difference Calculator

Count the days, weeks and months between two dates.

<m>

Meta Tag Generator

Generate SEO title, description, robots and viewport meta tags.

utm

UTM Link Builder

Add UTM campaign parameters to links for Google Analytics.

FAQ

FAQ Schema (JSON-LD) Generator

Create FAQPage structured data for rich results.

▥

Colour Palette Generator

Generate harmonious colour palettes and copy the HEX codes.

INV

Free Invoice Generator

Create a professional invoice and save it as a PDF using print.

YT

YouTube Title Generator

Generate click-worthy YouTube video titles from your topic and keywords.

IG

Instagram Caption Generator

Write Instagram captions in your tone, with optional emojis and hashtags.

#tag

Hashtag Generator

Generate relevant hashtags for Instagram, TikTok, X, LinkedIn or YouTube.

alt

Image Alt Text Generator

Generate descriptive alt text for any image to improve accessibility and SEO.

301

Redirect Checker

Trace every redirect hop for a URL and see status codes and the final destination.

rel

Canonical URL & SEO Page Checker

Check a page's canonical tag, robots directives, title, description and headings.

meta

Meta Description Generator

Create meta description options under 155 characters from your page details.

+%

Percentage Increase Calculator

Work out the percentage increase or decrease between two numbers.

Mtg+

Mortgage Overpayment Calculator

See how much interest and time you save by overpaying your mortgage.

Start with a goal

Freelancers

Quote it, bill it, keep what you earn.

  1. VAT Calculator
  2. Free Invoice Generator
  3. UK Take-Home Pay Calculator

Site owners

Faster pages that rank and share well.

  1. Image Compressor
  2. PNG to WEBP Converter
  3. Meta Tag Generator

Developers

Inspect, convert and debug in seconds.

  1. JSON Formatter & Validator
  2. JWT Decoder
  3. Regex Tester

Buying a home

Know the real monthly and upfront cost.

  1. Stamp Duty Calculator
  2. Mortgage Calculator
  3. UK Take-Home Pay Calculator

Students

Write, check and format your work.

  1. Word Counter
  2. Readability Score Checker
  3. Average Calculator

Marketers

Track campaigns and tidy up copy.

  1. UTM Link Builder
  2. Case Converter
  3. QR Code Generator

Browse by category

Image Tools

Compress, resize, convert and make QR codes.

15 tools

PDF Tools

Merge, split, rotate and build PDFs.

4 tools

Text Tools

Count, convert, sort and clean text.

20 tools

Developer Tools

JSON, Base64, regex, hashes and JWT.

25 tools

Finance & UK Tax

VAT, stamp duty, mortgage and take-home pay.

13 tools

Calculators

Percentages, BMI, averages and sums.

9 tools

Unit & Number Converters

Length, weight, temperature and data.

10 tools

Date & Time Tools

Ages, date gaps, time zones and timers.

8 tools

SEO & Marketing Tools

Meta tags, schema, sitemaps and UTM links.

15 tools

Salary & Take-Home Pay Calculators

Net pay for the US, Canada, Australia, Germany and more.

11 tools

VAT, GST & Sales Tax Calculators

Add or remove VAT, GST or sales tax in 30+ countries.

31 tools

Social Media & Content Tools

Captions, titles, hashtags and post formatting.

6 tools

Generators & Utilities

Passwords, pickers, palettes and invoices.

6 tools

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Automation: Zapier is the easier, more beginner-friendly tool with the larger catalogue of app integrations.

Canva vs Adobe Express

Design: Canva has the larger template library and the more polished collaboration features, making it the default choice for social media and team design.

Guides

All guides

How to Compress Images Without Losing Quality

Shrink JPG, PNG and WEBP files for faster websites while keeping them sharp. Practical settings that work.

How to Calculate VAT in the UK

Add or remove 20 percent VAT, understand the reduced and zero rates, and avoid common mistakes.

How to Merge PDF Files for Free

Combine several PDFs into one document without uploading them anywhere.

UK Take-Home Pay Explained for 2026/27

How income tax and National Insurance reduce your gross salary, with the main thresholds.

Questions

Are the tools on ToolStack Hub really free?

Yes. Every tool is free with no sign-up, usage limits or watermarks. The site is supported by advertising.

Are my files uploaded to your servers?

No. Tools run inside your browser, so images, PDFs and text stay on your device. We never see your content.

Do I need to install anything?

No. Everything works in a modern browser on desktop, tablet and mobile.

Which tools are most popular?

The most used tools are the Word Counter, Image Compressor, JSON Formatter, PDF merger, VAT calculator, UK take-home pay calculator and QR code generator.

Can I suggest a new tool?

Yes. Email us with the tool you need and we will consider adding it.

Need this automated for your business?

Vantalume builds custom AI and web automation workflows so your team can stop doing repetitive work.

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Missing a tool?

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