All free online tools175 tools

Every tool we have built so far, grouped by what it does. All of them are free, none of them need an account, and every one runs inside your browser.

✍️ Text Tools

Count words, characters, sentences and reading time instantly.

Convert text to UPPERCASE, lowercase, Title Case or Sentence case.

Have any text read aloud, in your choice of voice, without an account.

Compare two texts line by line and see exactly what changed.

Strip line breaks, duplicates, extra spaces and formatting from pasted text in one pass.

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

📊 Spreadsheet Tools

Turn an Excel file into clean CSV, one file per sheet, without opening Excel.

JSON to CSV Converter

Turn JSON arrays into properly quoted CSV, with nested keys flattened, locally.

Break a big CSV into smaller files by rows or file count, header repeated on every part.

Excel Formula Generator

Build VLOOKUP, SUMIF, IF and the rest by filling in boxes instead of remembering the order.

CSV Viewer and Cleaner

Open a CSV, see it as a proper table, clean it up and save it back.

Remove Duplicate Lines

Paste a list and strip out repeats, with counts and the order kept.

CSV to JSON Converter

Turn a spreadsheet export into clean JSON an API will accept.

🧮 Calculators

Find your exact age in years, months and days from your birth date.

Percentage Calculator

Work out percentages, increases, decreases and percentage change.

Convert length, weight, temperature, volume, area, speed and data.

Work out the tip, split the bill and round per-person totals without phone-at-the-table math.

Discount Calculator

Final price after one or stacked discounts, and reverse: what percent off was that really.

Percentage Increase Calculator

Find the percentage change between two numbers, up or down, with the maths shown.

Sales Tax Calculator

Add sales tax to a price or extract it from a total, with an editable rate.

Credit-weighted GPA on the 4.0 scale, with an editable grade table and cumulative mode.

Fuel Cost Calculator

Trip fuel cost from distance, economy and price, in US, UK or metric units.

Time Card Calculator

Weekly hours from start and end times, with breaks, overtime and gross pay.

💰 Finance Tools

Debt Payoff Planner

Turn a pile of debts into a dated plan. Snowball and avalanche, side by side.

FIRE Calculator

Your financial independence number, and the year you reach it.

Amortization Schedule

Every payment of a loan's life, and what extra payments save you.

Loan Comparison

Two loan offers side by side, judged on true total cost, fees included.

Zakat Calculator

Work out your zakat: assets, nisab check, and the 2.5% due.

Add tax to a price, or pull the exact tax out of a total. Both directions, done right.

Freelance Rate Calculator

Work backwards from the income you want to the hourly rate you must charge.

Salary Converter

Hourly, daily, weekly, monthly, yearly. Type any one, read the rest.

Savings Goal Calculator

How much per month, how long it takes, or where you end up. One goal, three answers.

Break-even Calculator

How many units you must sell before the business stops losing money.

Position Size Calculator

Risk a fixed slice of the account, size every trade from the stop.

CAGR Calculator

The one honest growth rate: compound annual growth between any two values.

Inflation Calculator

What money will be worth, and what things will cost, at any inflation rate.

Net Worth Calculator

Everything you own minus everything you owe, itemized, saved on your device.

Budget Calculator

The 50/30/20 rule on your income, with the ratios yours to bend.

Life Insurance Calculator

The DIME method: how much cover your family actually needs.

Health Insurance Cost Calculator

Deductible, coinsurance, out-of-pocket max: what a medical bill costs YOU.

Car Depreciation Calculator

The biggest cost of a car has no monthly bill. See it, year by year.

Currency Converter

Convert 30+ currencies on daily ECB reference rates, with the rate and its date shown.

Mortgage Payment Calculator

Work out your full monthly mortgage payment including tax, insurance and PMI.

Compound Interest Calculator

See how savings grow when interest earns interest, with regular deposits included.

Refinance Calculator

New payment, monthly saving and the break-even month where closing costs are recovered.

Loan EMI Calculator

Work out your monthly instalment, total interest and total payable.

Retirement Income Calculator

See what your savings will be worth at retirement and the yearly income they support.

Mileage Reimbursement Calculator

IRS mileage at the right rate, including the 2026 mid-year change most tools miss.

⚡ Generators

Password Generator

Create strong, random passwords with one click.

QR Code Generator

Turn any link or text into a QR code and download it as an image.

Random Number Generator

Generate random numbers in any range for draws, games and picks.

Signature Maker

Draw or type your signature and download it as a transparent PNG.

Put names on a wheel, spin it, get a fair winner. For classrooms, giveaways and lunch.

Lorem Ipsum Generator

Generate placeholder text in paragraphs, sentences or words.

Create ZIP File

Bundle any files into one zip with real compression, entirely on your device.

🩺 Health Tools

Calorie Calculator

BMR and daily calories by the Mifflin-St Jeor equation, with honest goals.

Macro Calculator

Calories into protein, carbs and fat, the way coaches actually split them.

Body Fat Calculator

The US Navy tape method: body fat percent from a few measurements.

Ideal Weight Calculator

Four published formulas side by side, plus the honest healthy range.

Water Intake Calculator

A daily water guideline from weight, training and climate. No myths.

Pregnancy Due Date Calculator

Due date by Naegele's rule, with weeks along and trimester milestones.

Work out your body mass index in metric or imperial units.

Sleep Cycle Calculator

Bedtimes and wake times built on 90-minute sleep cycles, honestly explained.

Running Pace Calculator

Pace, time or distance from the other two, with race presets and split tables.

📄 PDF Tools

Join several PDFs into one, in the order you choose, without uploading them.

Pull out the pages you need, or break a long PDF into equal pieces.

Straighten pages that were scanned sideways, all of them or just some.

Delete Pages from PDF

Take out the blank scans, the cover sheet, or anything you would rather not send.

Add Page Numbers to PDF

Number the pages of a contract or submission, with the cover left bare.

Mark a document as a draft or a copy before you send it on.

Turn every page of a PDF into a JPG or PNG image, right in your browser.

Reorder PDF Pages

Rearrange the pages of a PDF into any order and save a new copy.

Draw or type your signature and place it on any page of a PDF, entirely on your device.

Extract Text from PDF

Pull the text out of any PDF, page by page, without uploading the document.

Shrink scanned and image-heavy PDFs in your browser, with the trade-off stated up front.

Image to PDF Converter

Turn photos or scans into one PDF, in order, without uploading them.

🏠 Property Tools

Rent vs Buy Calculator

Both paths, year by year, with the break-even where buying starts winning.

Rental Property Calculator

Cash flow, cap rate, cash-on-cash and a 30-year projection for one rental deal.

Home Affordability Calculator

The 28/36 lending ratios banks use, run before they run them on you.

Rental Property Depreciation Calculator

IRS straight-line depreciation over 27.5 years, plus the recapture waiting at sale.

1031 Exchange Calculator

Deferred gain, boot, carryover basis and both hard deadlines as real dates.

Rental Yield Calculator

Gross, net and cash-on-cash yield, because listings quote whichever flatters.

Airbnb Calculator

Short-term rental income against long-term rent, with the break-even occupancy.

Down Payment Calculator

The deposit target, extras included, turned into a monthly saving plan.

What PMI costs and the exact month it can be cancelled and must be removed.

Property Appreciation Calculator

Future property value, nominal and after inflation, without the folklore.

Rent Split Calculator

Fair rent shares by room size, income or equality, with the working shown.

Rental Deal Screener

The 1%, 50% and 70% rules in one pass, so bad deals die in thirty seconds.

Cap Rate Calculator

Net operating income over price, the first number every rental investor checks.

Cash-on-Cash Return Calculator

Annual cash flow against the cash you actually put in, with loan payments included.

House Flip Calculator

Project cost, profit, ROI and the 70% rule check for a fix and flip.

BRRRR Calculator

Buy, rehab, rent, refinance: how much cash comes back out and what return stays in the deal.

DSCR Calculator

Debt service coverage ratio the way rental lenders compute it, plus your max loan at a target DSCR.

Closing Costs Estimator

Buyer closing costs as an editable line-item list with typical US ranges pre-filled.

Seller Net Proceeds Calculator

What actually lands in your account after commission, payoff, taxes and fees.

HELOC Calculator

Available credit line from your equity, and the monthly cost interest-only versus repayment.

🖼️ Image Tools

Convert iPhone HEIC photos to JPG files that open everywhere. In your browser, no upload.

Pull the text out of a photo or screenshot so you can copy and edit it.

See the hidden data in a photo, including GPS location, and download a clean copy.

Favicon Generator

Turn one image into every favicon size plus the ICO, manifest and head code, zipped.

Color Palette Extractor

Pull the dominant colors out of any photo as HEX and RGB, then export CSS variables.

Image Compressor

Shrink JPG, PNG and WebP images in your browser, or hit an exact file size like 200 KB.

Crop any image with aspect presets and pixel precision, at full original resolution.

Image Color Picker

Click any pixel in a photo to get its HEX, RGB and HSL, with a zoom loupe and history.

Image to WebP Converter

Convert PNG or JPG to WebP with a quality slider and live size savings, all in your browser.

SVG to PNG Converter

Render any SVG to a crisp PNG at the exact size you need, transparent or filled.

Aspect Ratio Calculator

Enter any two of width, height and ratio; scale sizes without distortion.

Photo Collage Maker

Combine up to nine photos into one image with grid layouts, spacing and rounded corners.

Cut an image into equal tiles for Instagram grids, downloaded as a numbered zip.

Classic top and bottom meme text on any image, draggable, no watermark.

Pixelate & Blur Image

Hide faces, plates and account numbers by drawing boxes; the pixels are really destroyed.

Resize images to exact dimensions without uploading them.

Turn a clip into an animated GIF in your browser, with start time, size and frame rate.

Image to Base64

Turn an image into a Base64 data URI you can paste into code.

Screen Recorder

Record your screen, a window or a tab with your mic, then download it. Nothing uploaded, no time limit.

🛒 Ecommerce Tools

Profit Margin Calculator

Work out margin and markup together, or the price that hits the margin you want.

Shopify Fee Calculator

See what actually lands in your account after payment fees, and which plan pays off.

Shopify Product CSV Generator

Build a product import file with the right columns and variant rows.

Invoice Generator

Fill in a form, download a clean invoice PDF. No account, no watermark, no nonsense.

Barcode Generator

Make Code 128 and EAN-13 barcodes as crisp SVG or PNG, ready for labels.

Quote Generator

A professional quote PDF with validity date and terms. No signup, no watermark.

A clean payment receipt PDF: who paid, for what, how. Done in a minute.

Purchase Order Generator

A proper PO with number and delivery date, so suppliers ship what you meant.

Credit Note Generator

The formal way to un-invoice: credits and refunds your bookkeeper will accept.

Packing Slip Generator

What is in the box, minus the prices. The document that belongs in the parcel.

Late Payment Interest Calculator

What an overdue invoice has cost, and the daily figure to put in the chaser.

🪙 Crypto Tools

Crypto Profit Calculator

What a trade actually made after both fees, and the real break-even price.

Crypto Average Cost Calculator

Turn a messy list of buys into one average cost and a true break-even.

Impermanent Loss Calculator

Put a number on the liquidity-pool trade-off before you provide.

Staking Rewards Calculator

APR compounded honestly: what a stake grows into, and the real APY.

Satoshi Converter

BTC, sats, mBTC and bits, converted exactly, with value at any price.

Crypto Price Converter

Convert between top coins and USD, EUR or GBP on live CoinGecko prices, with 24h change.

Crypto Fear & Greed Index

Today's market mood on the 0-100 fear and greed scale, with yesterday and last week beside it.

👨‍💻 Developer Tools

Format, minify and validate JSON with clear error messages.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text.

URL Encoder / Decoder

Encode text for use in a URL, or decode a URL back to readable text.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text.

Color Converter

Convert colors between HEX, RGB and HSL and preview them live.

Live regex matching with highlighted results, capture groups and a replace preview.

Cryptographically random v4 UUIDs, one or a thousand at a time.

Decode a JWT header and payload locally, with claims explained and expiry counted down.

Check A, MX, TXT and other DNS records for any domain through Google's DNS-over-HTTPS.

Timestamp Converter

Convert Unix timestamps to dates and back, in UTC and local time.

IP Address Lookup

See your public IP or look one up: country, ISP and timezone, with honest accuracy notes.

Color Contrast Checker

Live WCAG contrast ratio with AA and AAA pass badges for any text and background pair.

XML to JSON Converter

Convert XML to JSON and back, with the attribute and array conventions spelled out.

Markdown to HTML Converter

Paste Markdown, get clean HTML with a live rendered preview beside it.

Cron Expression Generator

Build or decode a cron schedule, read it in plain English, see the next five runs.

📣 Marketing & SEO Tools

Meta Tag Generator

Write title and description with live Google, Facebook and X previews, then copy the finished head code.

OG Image Generator

Design a 1200 by 630 social share image in your browser and download it as a PNG.

UTM Link Builder

Build clean, lowercase campaign links GA4 will group correctly, with presets and history.

Email Signature Generator

Create a professional HTML email signature and paste it straight into Gmail or Outlook.

SEO Content Analyzer

Check keyword placement, headings, sentence length and readability before you publish.

✍️ Writing & AI Tools

AI Token Counter

Count exact GPT tokens with real tokenizers and estimate what a prompt will cost.

Text Summarizer

Shrink long text to its strongest sentences, privately, with no AI model and no upload.

Readability Checker

Flesch, Flesch-Kincaid, Fog and SMOG scores plus the sentences dragging them down.

Dictionary Lookup

Definitions, pronunciation, synonyms and antonyms for any English word.

🕒 Time & Date Tools

Time Zone Converter

See one moment in every city that matters, with day-offset badges and a meeting-window hint.

Business Days Calculator

Count working days between dates or add N business days, with your own holidays respected.

Epoch & Unix Timestamp Converter

Convert Unix timestamps to readable dates and back, with seconds and milliseconds auto-detected.

Weather Forecast

Search any city for a 7-day forecast with rain probability, from the open Open-Meteo data.

Public Holidays Checker

Official public holidays for 100+ countries and any year, ready to paste into the business days calculator.

Date Difference Calculator

Count the days, weeks and months between any two dates.

How this collection is organized

We group tools by the job you are trying to finish rather than by how they work under the hood. If you are dealing with words on a page, you want the text tools. If you need the site to produce something for you, look in generators. If a number or a date is the answer you are after, the calculators section has it. And if you are debugging an API or a config file, the developer tools are built for exactly that.

Every tool page follows the same layout. The tool itself sits at the top so you can start working immediately, and the explanation, step by step instructions and common questions sit below it. Nothing is hidden behind a signup form and nothing counts your usage.

What every tool here has in common

The rule we follow is simple: your data stays on your device. When you paste text into the word counter, format a payload in the JSON formatter, or create a password with the password generator, the work happens inside your own browser using JavaScript. Nothing is uploaded to a server, nothing is logged, and closing the tab clears everything.

That design has a nice side effect beyond privacy. Because there is no round trip to a server, the tools respond instantly and keep working even on a slow connection. It also means we can honestly say there are no usage limits. There is no server cost per calculation for us to meter.

Missing something?

This list grows regularly, and a good number of the tools already here started life as a suggestion from someone who needed them. If the tool you want is not on this page, tell us what you are trying to do on the contact page and we will look at building it. Simple, well defined tools that solve one problem properly are exactly what we like to add.