Tools / Free Utilities

Free tools toget things done.

149+ genuinely useful web tools — free to use, with an optional Pro unlock for unlimited access and no watermarks.

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Nouveau · 3D

Studio Floor Planner — 2D → 3D → PDF

Chargez un plan, calibrez l'échelle réelle, placez les packs meublés Makasa (décret 2015-981), visualisez en 3D isométrique et exportez un rapport PDF prêt à imprimer.

Marketing

21 tools

Codes

QR Code Generator

Custom QR codes with your colours, downloadable as PNG.

Thumbnails

YouTube Thumbnail Grabber

Download any YouTube video thumbnail in every size.

Campaign Tracking

Campaign Tracking

UTM Link Builder

Build clean UTM-tagged URLs for your campaigns.

Email

Email Subject Tester

Spam-trigger words and length check for subject lines.

Email List Validator

Check a whole list of emails for format errors.

Names & Ideas

Domain Name Ideas

Your name across every TLD worth having.

Social Media

Social Bio Counter

Character limits for every platform's bio.

Ads & Revenue

Ad Campaign Analyzer

CPM, CPC, CPA and ROAS from one campaign — benchmarked.

Conversion Rate Calculator

Visitors → customers, funnel value and what small gains are worth.

Link Builders

WhatsApp Link Builder

Click-to-chat links with a prefilled message.

Mailto Link Builder

Email links with subject and body prefilled.

Social Share Link Builder

Share URLs for X, LinkedIn and Facebook.

Google Calendar Link

Add-to-calendar links for events and launches.

Google Maps Link Builder

Direct search links to any address.

General

Lead Management

Lead Response Loss Calculator

Estimate how much monthly revenue your business may be losing by taking too long to respond to new leads.

Customer Payback Period Calculator

Estimate how many months it takes to recover your customer acquisition cost from gross profit.

Blended CAC Calculator

Calculate your true customer acquisition cost across paid spend, team time, and tools so you can judge channel efficiency more realistically.

Ad Creative Fatigue Scorecard

Estimate whether a paid social ad creative is likely fatigued and needs refreshing based on frequency, CTR change, CPA change, and days live.

Google Business Review Rate Calculator

Estimate how many customers you need to ask each month to hit your target number of new Google reviews.

Email List Churn Impact Calculator

Estimate how much monthly email revenue you lose from unsubscribes and list decay, so you can justify retention and re-engagement work.

Podcast Sponsorship CPM Calculator

Estimate what a podcast ad slot is worth based on average episode downloads, ad load, and campaign length.

Business

17 tools

Documents

Invoice Generator

Create clean, branded PDF invoices in seconds.

Online Fax

Send a fax from your browser (provider key required).

vCard Generator

Downloadable contact card for your email signature.

Pricing

Freelance Rate Calculator

Hourly and day rates that actually cover salary, tax, costs and downtime.

Markup vs Margin Calculator

Price from margin or markup, convert between them, with a pricing ladder.

Metrics

Break-Even Calculator

Break-even point plus a profit ladder around it.

Customer Acquisition Cost

Fully-loaded CAC, LTV ratio and payback period.

Customer Lifetime Value

LTV with margin, referrals and a year-by-year value build-up.

Churn & Retention Calculator

Monthly churn, customer lifespan, revenue bleed and net growth.

NPS Calculator

Net Promoter Score with segment breakdown and benchmark verdict.

Money

ROI Calculator

Total and annualized return, inflation-adjusted, with a plain-English verdict.

Commission Calculator

Tiered commission with quota attainment and accelerator rates.

Meeting Cost Calculator

The fully-loaded price of a meeting — and the recurring-meeting horror number.

Ads & Revenue

Ad Revenue Estimator

Display-ad earnings from YOUR traffic pattern — with a 12-month growth projection.

General

Gross Margin Safety Buffer Calculator

See how much revenue can drop before a product or service line stops covering its fixed monthly costs.

Decision Making

Return on Time Invested Calculator

Estimate the dollar value you earn for each hour spent on a recurring marketing, content, or client activity.

Sales Operations

Lead Follow-Up Capacity Calculator

Estimate how many new leads your team can realistically follow up within your target response window each day.

Media

2 tools

Editing

Image Compressor

Resize, compress & convert images (JPEG/PNG/WebP).

Data & Files

Image → Base64 Converter

Convert any image into a Data URL for CSS or emails.

Documents

1 tools

PDF

PDF Merge & Split

Combine PDFs right in your browser — private & fast.

Writing

5 tools

Analysis

Word & Character Counter

Counts, reading time, and case converters.

Reading Time Estimator

Silent and aloud reading time, plus speech pacing for recordings.

Writing Help

Markdown Live Preview

Type Markdown, get instant HTML preview & copyable output.

Editing

Text Diff Checker

Compare two blocks of text word-by-word.

Emoji Remover

Strip emoji and unicode symbols from any text.

Security

5 tools

Security

Password Generator

Strong, secure passwords generated locally.

Password Strength Checker

See how tough your password really is — locally, never sent.

Password Generator

Cryptographically-secure passwords with your rules.

Hash Generator

SHA-256, SHA-512 & SHA-1 hashes of any string.

Password Strength Analyzer

Crack time against three real attacker profiles — locally computed.

SEO

7 tools

On-Page SEO

Meta Tag Generator

SEO & social meta tags with live search preview.

SEO Slug Generator

Turn any title into a clean, SEO-friendly URL slug.

Meta / OG Preview

See exactly how your page will look on Google, X, LinkedIn.

Keyword Density Checker

How often your target keyword appears.

SEO Title & Description Checker

Pixel-safe lengths for Google snippets.

Technical SEO

robots.txt Builder

Generate a clean robots.txt for any site.

General

Local SEO Photo Gap Calculator

Estimate how many new Google Business Profile photos you should add each month to stay competitive with nearby businesses.

Developer

17 tools

Code Text

JSON Formatter & Validator

Pretty-print, minify and validate JSON in your browser.

Regex Tester

Test JavaScript regex against any string with live highlights.

Line Number Adder

Prefix every line with its number.

HTML Tag Stripper

Extract clean text from any HTML.

Data & Files

Base64 Encoder / Decoder

Encode text to Base64 and back, safe for URLs & APIs.

URL Encoder / Decoder

Percent-encode strings for safe URLs and query params.

JSON String Escaper

Escape any text for safe embedding in JSON.

Security

UUID Generator

Generate cryptographically-random UUIDs by the batch.

JWT Decoder

Decode header + payload from any JSON Web Token.

Nano ID Generator

Short URL-safe unique IDs by the batch.

Units

Timestamp Converter

Unix ↔ human-readable date, both directions.

Layout & CSS

Aspect Ratio Calculator

Scale any dimension without distortion.

Technical SEO

.htaccess Redirect Builder

301 redirect rules from old→new path pairs.

Sysadmin

Chmod Calculator

Unix permissions to octal, explained.

Cron Expression Builder

Every N minutes/hours/days → cron syntax.

Web

URL Parser

Break any URL into protocol, host, path and params.

Design

CSS Triangle Generator

Pure-CSS arrows in any direction.

Design

6 tools

Color & CSS

Color Palette Generator

Pick a color and get tints, shades, and complements.

Color Contrast Checker

WCAG contrast score for any foreground/background pair.

Color Mixer

Blend two HEX colors at any ratio.

Design

CSS Gradient Generator

Design gradients visually and copy production CSS.

Text Shadow Generator

Layered CSS text-shadows, copy-ready.

Favicon Generator

Type a letter, download a crisp favicon.

Utility

7 tools

Units

Unit Converter

Length, weight & temperature — instantly, offline.

Everyday Math

Percentage Calculator

Discounts, tax, tips, growth-rate — all in one place.

Dates & Time

Age & Date Calculator

Years-months-days between any two dates.

Time

World Clock — Live

Current time across the markets I work in.

Focus & Timers

Pomodoro Timer

25-minute focus blocks with break reminders.

Stopwatch

Precise stopwatch with lap times.

Countdown Timer

Set minutes, get alerted when time's up.

Calculators

18 tools

Money

Tip Calculator

Split the bill and tip fairly, per person — with a full tip-percentage reference table.

Loan Payment Calculator

Monthly payment, true cost with fees, and how extra payments shorten any loan.

Mortgage Calculator

Full monthly cost (PITI + HOA + PMI), upfront cash and year-by-year equity.

Compound Interest Calculator

Year-by-year growth table, inflation-adjusted value and contribution raises.

VAT / Sales Tax Calculator

Add or remove tax, see the real tax share, per-unit breakdowns.

Discount Calculator

Stacked discounts decoded — real price, real savings, tax included.

Savings Goal Calculator

Monthly amount with interest, milestone dates and a progress timeline.

Debt Payoff Calculator

Freedom date, total interest, and how extra payments melt the schedule.

Salary ↔ Hourly Converter

Real hourly rate after holidays and tax — both directions.

Overtime Pay Calculator

Weekly pay with tiered overtime, tax and an annual view.

Electricity Cost Calculator

True running cost and CO₂ of any appliance — with standby waste.

Education

GPA Calculator

Weighted GPA with per-course breakdown and honors check.

Travel

Fuel Cost Calculator

Trip cost, per-passenger split and CO₂ footprint of the drive.

Dates & Time

Date Difference Calculator

Days, workdays, weekends and calendar months between two dates.

Business Days Calculator

Deadline math that skips weekends — with calendar context.

Days Until…

Countdown to any date — with workdays, weekends and planning hours.

Everyday Math

Rule of Three

Direct and inverse proportion solver with the formula shown.

Percentage Change

Growth or decline, the multiplier, and what it takes to get back.

Health

4 tools

Health

BMI Calculator

BMI with WHO context, healthy weight range and waist-to-height risk check.

Daily Calorie Estimator

Mifflin-St Jeor BMR, activity-adjusted needs, goal targets and protein.

Running Pace & Race Predictor

Pace, splits and Riegel-predicted finish times for every distance.

Water Intake Calculator

Daily hydration target adjusted for exercise and climate.

Converters

20 tools

Data & Files

CSV → JSON Converter

Turn spreadsheet exports into clean JSON.

JSON → CSV Converter

Flatten a JSON array into a spreadsheet-ready CSV.

List ↔ Comma Converter

Line-by-line lists to comma-separated and back.

HTML Entity Encoder

Escape text for safe HTML, and unescape it back.

CSV → Markdown Table

Paste CSV, get a perfectly aligned Markdown table.

JSON → YAML Converter

Turn JSON config into readable YAML.

JSON → XML Converter

Convert JSON objects into XML markup.

Markdown → HTML

Headings, bold, links and lists to clean HTML.

Color & CSS

HEX ↔ RGB Converter

Convert colors both ways, with a live swatch.

PX ↔ REM Converter

Convert pixel values to accessible rem units.

Text & Codes

Text ↔ Binary Converter

See your words as pure ones and zeros.

Morse Code Translator

Encode and decode Morse, dots and dashes.

Roman Numeral Converter

Numbers to Roman numerals and back.

Number Base Converter

Decimal, hex, octal and binary at once.

Language & Speech

Language & Speech

Language Translator

Translate English into 20 languages, instantly.

Language & Speech

Text to Speech Reader

Any text read aloud by your browser — free.

Language & Speech

Speech to Text

Dictate instead of typing (Chrome/Edge).

Units

Data Storage Converter

Bytes to GB to TB — any direction.

Speed Converter

km/h, mph, m/s and knots at once.

Time Zone Converter

What time is 3pm in New York in Singapore?

Text

11 tools

Editing

Case Converter

UPPER, lower, Title, camelCase and snake_case.

Text Reverser

Flip text backwards — characters or whole lines.

Duplicate Line Remover

Dedupe any list while keeping the order.

Line Sorter

Sort lists A–Z, Z–A, or by length.

Whitespace Cleaner

Trim lines, collapse double spaces, kill blank lines.

Find & Replace

Bulk replace across any block of text.

Analysis

Word Frequency Counter

Find the most-used words in any text.

Palindrome Checker

Is it the same forwards and backwards?

Readability Score

Flesch reading-ease score for your writing.

Writing Help

Lorem Ipsum Generator

Classic placeholder text, your paragraph count.

Headline Capitalizer

AP-style title case for headlines.

Generators

12 tools

Names & Ideas

Username Generator

Available-looking usernames from your keyword.

Hashtag Generator

Related hashtags for any topic.

Business Name Ideas

Combinator names around your keyword.

Random & Fun

Random Number & Dice

Random picks in any range — dice included.

Coin Flip

Heads or tails, with a running tally.

Lottery Number Picker

Unique random picks for any lottery format.

Test Data Generator

Fake names and emails for testing forms.

Random Team Picker

Shuffle any list into fair random order or teams.

Random Winner Picker

Pick one random winner from any list — giveaways made fair.

Security

Passphrase Generator

Memorable diceware-style passphrases.

Design

CSS Box Shadow Generator

Tune a soft shadow and copy the CSS.

Codes

WiFi QR Code Generator

Guests join your WiFi with one scan.

Fun

6 tools

Text Effects

Upside Down Text

Flip your text uʍop ǝpᴉsdn.

Small Caps Text

ᴛɪɴʏ ᴄᴀᴘɪᴛᴀʟs for bios and headlines.

Strikethrough Text

S̶t̶r̶i̶k̶e̶ any text with unicode.

Leetspeak Translator

7urn 73x7 1n70 l33t.

aLtErNaTiNg CaSe

mOcKiNg SpOnGeBoB text generator.

𝗕𝗼𝗹𝗱 𝗧𝗲𝘅𝘁 Generator

Unicode bold for social posts that pop.

E-commerce

11 tools

General

Break-Even ROAS Calculator

Calculate the return on ad spend you need just to break even after product costs, payment fees, and overhead.

Inventory Months on Hand Calculator

Estimate how many months your current stock will last based on sales pace, so you can reorder before you run out or tie up too much cash.

Return Processing Cost Calculator

Estimate the true cost of customer returns per month so you can set policies, improve product pages, and protect margin.

Discount Profit Impact Calculator

See how much extra sales volume you need to maintain gross profit after running a discount promotion.

Promotion Profit Lift Calculator

Estimate whether a discount promotion is likely to increase total gross profit, based on your margin and expected sales lift.

Inventory Reorder Point Calculator

Calculate the stock level where you should place your next purchase order to reduce stockouts during supplier lead time.

Revenue Optimization

AOV Lift Revenue Calculator

Estimate how much extra monthly revenue an online store could generate by increasing average order value with bundles, upsells, or threshold offers.

Affiliate Pricing

Affiliate Commission Viability Calculator

Estimate the maximum affiliate commission rate you can offer while still protecting your target profit margin on each sale.

Conversion Optimization

Cart Abandonment Revenue Calculator

Estimate how much monthly revenue you could recover by improving checkout completion.

Repeat Purchase Revenue Uplift Calculator

Estimate how much monthly revenue you could add by improving repeat purchase rate in your store.

Shopify Fee Impact Calculator

Estimate how much of each order you keep after payment processing and app subscription costs.

Education

4 tools

General

Course Profit Margin Calculator

Estimate the profit margin on a live or recorded course after platform fees and delivery costs.

Teacher Workflow

Teacher Grading Time Saved Calculator

Estimate how many hours a teacher saves per term by switching to faster grading workflows, rubrics, or auto-graded assignments.

Classroom Copy Budget Calculator

Estimate the real monthly cost of printed handouts so teachers and school teams can decide when to switch materials to digital.

Online Course Refund Risk Calculator

Estimate how much refund exposure your next course launch carries based on sales volume, price, refund rate, and processor fees.

Productivity

2 tools

General

Meeting Cost Calculator

Estimate the real cost of a meeting based on attendee count, average hourly pay, and duration.

Project Planning

Deadline Risk Scorecard

Estimate how likely a project, campaign, or assignment is to miss its deadline based on common risk factors teams overlook.

Finance

1 tools

General

Cash Reserve Runway Calculator

Estimate how many months your business can operate before cash runs out based on current reserves, monthly fixed costs, and gross margin.

Social Media

1 tools

General

Organic Social Engagement Rate Calculator

Calculate engagement rate by followers for an organic social post or campaign to benchmark content performance.

Content

1 tools

General

Creator Monetization

YouTube Sponsorship Fair Price Calculator

Estimate a fair flat-fee sponsorship price for a YouTube video using expected views, engagement, and how integrated the brand mention will be.

Affiliate picks

Level up with these tools

Deeper software recommendations, curated by Julius. Some are affiliate links — same price for you.

Recommended Web Hosting

Website Resources

Recommended Web Hosting

The hosting Julius recommends for fast, affordable websites. (Affiliate link)

Namecheap — Domains & Email

Website Resources

Namecheap — Domains & Email

Cheap, no-nonsense domains and privacy-protected WHOIS. My go-to registrar for every project.

Framer — No-Code Websites

Website Resources

Framer — No-Code Websites

Design and publish stunning sites without a developer. My favorite for landing pages.

Canva Pro — Design Anything

Amazon · Affiliate

Canva Pro — Design Anything

The design tool I use for social graphics, thumbnails, and quick brand assets.

See price on AmazonBuy on Amazon

ConvertKit — Creator Email

Marketing Resources

ConvertKit — Creator Email

Simple, powerful email marketing built for creators. Free up to 10k subscribers.

Fathom Analytics — Privacy-First

Marketing Resources

Fathom Analytics — Privacy-First

Google Analytics without the creepy tracking. Fast, private, GDPR-friendly.

More of the site

Everything else,
one click away.

AVENO

My own goods brand — apparel, drinkware, tech and more.

Shop

My hand-picked tools, books and gear — affiliate picks.

Website Previewer

Describe your project and watch a working preview generate live.

Blog

Guides on websites, pricing, growth, and every tool here.

Clients

The businesses I've had the honor of helping grow.

Your Market

Web design for your country, city, or industry — worldwide.

Julius, your guide

Julius · your guide

Hey, I'm Julius — welcome! Here's how getting your website or app built works, in three simple steps.

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