51+Free Tools for Marketers & Developers

Calculate marketing metrics, encode data, generate hashes, and more. 100% free, no sign-up, no data storage. Everything runs securely in your browser.

51 Tools Active

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Ad Metrics

Calculate CPM, CPC, CTR, CPA, and ROAS for ad campaigns

5 tools →

SEO Tools

Meta tags, slugs, and SEO ROI calculators

3 tools →

Conversion

Track conversion rates across sales funnels and channels

3 tools →

Finance

Profit margins, COGS, CLV, and financial metrics

5 tools →

UTM Tracking

UTM campaign tracking and parameter builders

1 tools →

SaaS Metrics

Essential metrics: MRR, ARR, NRR, churn, and retention

7 tools →

Text Tools

Case conversion, line sorting, and text manipulation

2 tools →

Encoding Tools

Base64, Base32, Base58, hex, and text encoding

7 tools →

HTML Tools

HTML validation, formatting, encoding, and stripping

5 tools →

JSON Tools

JSON escaping, PHP array conversion, and XML escaping

3 tools →

Dev Utilities

QR codes, URL parsing, SQL tools, and PIN generation

5 tools →

Hash Tools

SHA, bcrypt, and RIPEMD hash generation

5 tools →

Most Popular Tools

CPM Calculator

Calculate cost per thousand impressions instantly

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Meta Length Checker

Check meta title and description character limits

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Conversion Rate Calculator

Calculate your conversion rate percentage instantly

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Cost of Goods Sold Calculator

Calculate COGS for accounting and profitability analysis

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CPC Calculator

Calculate cost per click for your ad campaigns

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UTM Link Builder

Build tracked URLs with UTM parameters

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Revenue Run Rate Calculator

Project annual revenue from current pace

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SaaS SEO ROI Calculator

Calculate return on investment from SEO efforts

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Why Calcyo?

100% Free, No Sign-up

All tools are completely free with no account required. Just visit and start using.

Runs in Your Browser

Every calculation happens on your device. Nothing is stored on our servers.

Instant Results

See results as you type. No waiting, no delays, no uploads.

Works on Mobile

Full functionality on phones and tablets. Built responsive from the ground up.

All 51 Tools

Marketing & SEO Tools

Developer & Encoding Tools

Frequently Asked Questions

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No sign-up required. Just pick a tool and start working. Everything stays private on your device.