Botvana's free online tools: 111 fast, no-sign-up utilities for students, bloggers, freelancers and small businesses. Generate AI images, text and stories, write better AI prompts, plan money and health, edit images and videos, and more.
Almost every tool runs entirely in your browser, so nothing you type or upload leaves your device. The AI generators are the exception: they send only your prompt to a free AI service to create the result. Use the search box or category buttons below to jump to what you need.
🎨 AI Generators
AI Image Generator
Type a prompt, pick a style and size, and create an image in your browser. No sign-up, no API key, safe filter on.
Open tool →AI Text Generator
Blog intros, emails, social captions, rewrites and product descriptions in seconds. No sign-up or API key.
Open tool →AI Story Generator
Bedtime stories for kids, short stories and plot ideas in any genre, tone and length. No sign-up or API key needed.
Open tool →📖 Story Prompts
Story Video Prompt Generator
Turn a story idea into scene-by-scene AI video prompts with a character sheet, shots, camera moves and voiceover for Sora, Veo, Kling or Runway.
Open tool →Cartoon Story Prompt Generator
Kids story outline plus scene image prompts in Pixar-like 3D, anime or 2D style with consistent characters.
Open tool →🤖 AI Tools
AI Tool Finder
Answer 3 quick questions and get the best AI tools for writing, coding, images, video, meetings and more.
Open tool →AI Prompt Generator
Build clear, structured prompts for ChatGPT, Gemini, Claude and Grok. Pick a goal, topic and tone.
Open tool →AI Token Counter
Estimate tokens for ChatGPT, Claude, Gemini or Grok prompts, check context fit and API cost.
Open tool →AI Subscription Cost Calculator
Add up ChatGPT, Gemini, Claude, Grok and Perplexity plans over any number of months, in $, £ or €.
Open tool →AI Text Summarizer
Paste long text and get a short summary plus key points. Private, because it runs in your browser.
Open tool →AI Headline Generator
Get 15+ blog and YouTube title ideas with character counts and a 60-character SEO check.
Open tool →AI Image Prompt Generator
Build prompts from subject, style, lighting, camera and mood for Midjourney, Imagen, DALL-E or Grok.
Open tool →AI Video Prompt Generator
Build shot-by-shot prompts with subject, action, camera movement, lighting and style for Veo, Sora, Runway or Kling.
Open tool →System Prompt Builder
Create clear custom instructions for ChatGPT, Gemini, Claude, Grok or your own AI app: role, tone, format and rules.
Open tool →AI API Cost Calculator
Enter your model’s price per million tokens and your usage to estimate cost per request, per day and per month.
Open tool →AI Text Cleaner
Strip Markdown asterisks and hashes, hidden Unicode characters and odd spacing from ChatGPT, Gemini or Claude output.
Open tool →💰 Money & Business
Mortgage Calculator
Monthly payment, total interest and a yearly amortization schedule, with tax and insurance.
Open tool →Loan Calculator
Monthly payment and total interest for any loan, plus how much extra payments save.
Open tool →Compound Interest Calculator
See savings grow with monthly contributions and a year-by-year table.
Open tool →Tip Calculator
Tip, total and per-person share with round-up, plus a tipping guide for 5 countries.
Open tool →Invoice Generator
Create a clean invoice with items, tax and discount, then print or save it as a PDF.
Open tool →Sales Tax & VAT Calculator
Add or remove sales tax or VAT, with presets for the US, UK, Germany, Australia and Canada.
Open tool →Discount Calculator
Sale price, savings, stacked discounts and the original price before a discount.
Open tool →Salary to Hourly Calculator
Convert between hourly, daily, weekly, monthly and annual pay.
Open tool →ROI Calculator
Return on investment, net profit, annualized ROI (CAGR) and payback period. Compare two options side by side.
Open tool →Profit Margin Calculator
Margin, markup and profit from cost and price, or the price needed for a target margin.
Open tool →Freelance Rate Calculator
Find the hourly and day rate you need from your target income, expenses, taxes, time off and billable hours.
Open tool →🧮 Calculators & Converters
Percentage Calculator
% of a number, percent change, and adding or removing a percentage, with the working shown.
Open tool →Scientific Calculator
Trig, logs, powers, roots and factorials with degree/radian mode and history.
Open tool →Unit Converter
Length, weight, temperature, volume, area, speed and storage, including US vs UK units.
Open tool →Aspect Ratio Calculator
Find the ratio of any size, or the missing width or height for 16:9, 4:3, 1:1, 9:16 and more. Common sizes included.
Open tool →Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers, simplify, and convert to decimals.
Open tool →Standard Deviation Calculator
Paste numbers to get sample and population SD, variance, mean, median, mode, range and quartiles, with steps.
Open tool →Roman Numeral Converter
Numbers to Roman numerals and back (1–3,999,999), with dates, validation and a step-by-step breakdown.
Open tool →Morse Code Translator
Convert text to Morse code and Morse back to text, then play it as audio or flashing light at your chosen speed.
Open tool →Binary Translator
Convert text to binary, hexadecimal, decimal or octal and back, UTF-8 and emoji safe. Plus a number base converter.
Open tool →❤️ Health & Fitness
BMI Calculator
Body mass index in metric or imperial units, WHO category and healthy weight range.
Open tool →Calorie Calculator
BMR and daily calories (TDEE) with targets to maintain, lose or gain weight.
Open tool →Body Fat Calculator
US Navy tape-measure method with ACE body fat categories.
Open tool →Due Date Calculator
Estimate your due date from your last period, conception or IVF transfer.
Open tool →Sleep Calculator
Best bedtimes or wake-up times based on 90-minute sleep cycles.
Open tool →⏰ Date & Time
Age Calculator
Exact age in years, months and days, total days lived and a next-birthday countdown.
Open tool →Date Calculator
Days between dates, business days, and adding or subtracting days, weeks, months or years.
Open tool →Time Zone Converter
Convert times between New York, London, Berlin, Sydney and 400+ zones, DST-aware.
Open tool →Online Timer & Stopwatch
Countdown with alarm, stopwatch with laps, and a full-screen mode for rooms.
Open tool →Pomodoro Timer
25/5 focus sessions with long breaks, sound alerts and a session counter.
Open tool →Unix Timestamp Converter
Turn epoch seconds or milliseconds into a readable date in UTC and your time zone, or any date into a timestamp.
Open tool →✍️ Text & Writing
Word Counter
Count words and characters, see reading time and keyword density, and convert text case.
Open tool →Typing Speed Test
Measure your WPM and accuracy in 1, 2 or 5 minutes with live error highlighting.
Open tool →Text to Speech
Hear any text read aloud with your device’s voices. Change voice, speed and pitch.
Open tool →Fancy Text Generator
Bold, italic, script, bubble and upside-down Unicode text to copy and paste.
Open tool →Keyword Density Checker
Find the most-used words and 2–3 word phrases in your text, with counts and percentages, stop words filtered out.
Open tool →Text Diff Checker
Compare two texts side by side and highlight added, removed and changed lines and words. Ignore case or spaces. Nothing uploaded.
Open tool →Online Notepad
Multiple notes, word count, find, download as .txt and open text files. No sign-up.
Open tool →Lorem Ipsum Generator
Create placeholder paragraphs, sentences, words or list items as plain text or HTML. Copy in one click.
Open tool →Text Cleaner
Remove line breaks, extra spaces, empty or duplicate lines, sort or reverse lines, and change case in one place. Runs locally.
Open tool →🎬 Video Tools
YouTube Thumbnail Downloader
Paste a video or Shorts link to view and save the thumbnail in HD 1280x720, SD and every other size.
Open tool →Video Compressor
Shrink MP4, MOV and WebM videos for email, WhatsApp or Discord by lowering resolution and bitrate. No upload, no watermark.
Open tool →Video Trimmer
Cut the start and end off any MP4, MOV or WebM clip, preview the exact part you keep and save it. No upload, no watermark.
Open tool →Video Resizer
Change any video to 9:16 for Reels, TikTok and Shorts, 1:1, 4:5 or 16:9, with blur, colour or crop fill. No upload.
Open tool →Video to GIF Converter
Turn any MP4, MOV or WebM clip into an animated GIF. Choose start, length, width and frame rate. No upload.
Open tool →Audio Extractor (Video to MP3)
Convert your MP4, MOV or WebM video to MP3 or WAV, trim the part you need and save it. Runs in your browser, no upload.
Open tool →YouTube Tag & Title Generator
Turn your topic into SEO tags, hashtags and click-worthy titles that fit YouTube limits. Copy in one tap.
Open tool →🖼️ Image & Design
Image Resizer
Resize photos to exact pixels or presets for Instagram, YouTube, Facebook, LinkedIn, X and Pinterest.
Open tool →Image Compressor
Shrink JPG, PNG and WebP files with a quality slider. See the size saved. Nothing is uploaded.
Open tool →Color Picker
HEX, RGB, HSL and CMYK codes, WCAG contrast check, and pick colours from an image.
Open tool →Image to PDF
Combine JPG or PNG images into one PDF in A4, Letter or original size.
Open tool →Image Converter
Convert images between JPG, PNG and WebP in your browser.
Open tool →Image Cropper
Drag to crop, lock 1:1, 4:5 or 16:9, rotate and download.
Open tool →Meme Generator
Add classic top and bottom text to your own image. No watermark.
Open tool →Color Palette Generator
Create harmonious colour schemes from one base colour, lock favourites, check text contrast and export CSS variables.
Open tool →Favicon Generator
Make favicon.ico, Apple touch and Android icons from an image, letters or an emoji, plus the HTML to add them. No upload.
Open tool →CSS Gradient Generator
Linear or radial, multiple colour stops and presets. Copy the CSS or download a PNG.
Open tool →Box Shadow Generator
Design soft, layered or inset shadows with sliders and a live preview, then copy the CSS. Presets included.
Open tool →💻 Developer & Security
JSON Formatter & Validator
Beautify, minify and validate JSON, including AI structured output, with line and column errors.
Open tool →Password Generator
Create strong random passwords or passphrases with a secure browser generator and a strength meter.
Open tool →Meta Tag Generator
Create SEO title and description tags plus Open Graph and Twitter Card tags with length checks. Copy the HTML in one click.
Open tool →Schema Markup Generator
Create valid JSON-LD structured data for Article, Product, Organization, Local Business and Breadcrumb pages.
Open tool →Robots TXT Generator
Allow or block search engines and AI crawlers like GPTBot, Google-Extended and ClaudeBot, add sitemaps and blocked paths.
Open tool →UTM Builder
Add utm_source, medium, campaign, term and content to any URL for Google Analytics 4 tracking, with presets and naming checks.
Open tool →JWT Decoder
Paste a JSON Web Token to read its header and payload, see issued and expiry times, and check if it has expired. Runs locally.
Open tool →Regex Tester
Test JavaScript regular expressions live with match highlighting, capture groups, flags and replace preview. Private, in-browser.
Open tool →Base64 Encoder Decoder
Convert text or files to Base64 and back, UTF-8 and emoji safe, URL-safe option, data URIs. Runs in your browser.
Open tool →URL Encoder Decoder
Percent-encode or decode text, choose component or full-URL mode, and break a URL into its query parameters.
Open tool →UUID Generator
Create random v4 or time-ordered v7 UUIDs (GUIDs), up to 1,000 at once, with uppercase, no-hyphen and braces options.
Open tool →Hash Generator
Get SHA-256, SHA-512, SHA-384, SHA-1 and MD5 hashes of text or files, and compare against a checksum. Nothing uploaded.
Open tool →CSV to JSON
Free CSV to JSON converter that also turns JSON back into CSV. Handles quoted fields, commas, new lines, tabs and semicolons. Nothing uploaded.
Open tool →Markdown to HTML
Headings, lists, links, tables, code blocks. Paste AI chat output and get clean HTML.
Open tool →Code Minifier
Strip comments and whitespace safely, see bytes saved, copy or download. Runs in your browser.
Open tool →SQL Formatter
Beautify messy queries with clean indentation, one clause per line and uppercase keywords, or minify to one line. Runs locally.
Open tool →XML Formatter
Pretty-print XML with clean indentation, minify it, and find syntax errors with line numbers. Nothing uploaded.
Open tool →Cron Generator
Build crontab schedules, translate any cron expression into plain English and see the next run times.
Open tool →SERP Snippet Preview
See how your title and meta description look in Google on desktop and mobile, with pixel-width truncation checks.
Open tool →Slug Generator
Turn any title into a clean, lowercase, hyphenated slug. Removes accents, symbols and optional stop words. Bulk mode too.
Open tool →✨ Generators
QR Code Generator
Make free static QR codes for links, text, Wi-Fi and email. Custom colours, PNG and SVG download, no expiry.
Open tool →Random Number Generator
Fair, crypto-secure random numbers in any range, with or without repeats.
Open tool →Spin the Wheel
A fair random name picker wheel for classrooms, giveaways and quick decisions.
Open tool →Barcode Generator
Create Code 128 and EAN-13 barcodes with check digits calculated for you. Download sharp SVG or PNG files. No upload.
Open tool →Username Generator
Create cool, unique usernames for gaming, Instagram, TikTok or Discord by style, keyword and length. Copy in one click.
Open tool →Business Name Generator
Get brandable company, shop and startup name ideas from your keywords and industry, with styles from classic to modern.
Open tool →Dice Roller
Roll d4 to d100 or type D&D notation like 2d6+3 or 4d6kh3, with advantage, coin flip and roll history. Fair, secure random.
Open tool →🎓 Students & Education
🖥️ Device Tests
Mic Test
Check your microphone with a live level meter and a 5-second playback.
Open tool →Webcam Test
Check your camera, its real resolution and frame rate, and take a snapshot.
Open tool →Screen Recorder
Record your screen, a window or a tab with mic audio and save the video.
Open tool →Voice Recorder
Record from your mic with pause and resume, play back and download.
Open tool →Keyboard Tester
Press keys to see them light up on a full keyboard map, spot dead or stuck keys, and check ghosting (rollover).
Open tool →🎵 Audio Tools
Metronome
Accurate online metronome: 20–300 BPM, time signatures, accented downbeat, subdivisions, tap tempo and a visual beat.
Open tool →Tone Generator
Play a pure sine, square, sawtooth or triangle wave at any frequency, sweep a range, or test left and right speakers.
Open tool →White Noise Generator
Play white, pink or brown noise for sleep, focus or calming a baby, with a fade-out sleep timer. No ads, no loops.
Open tool →How to get the most from these tools
Use them together. Start with the readiness quiz to see where AI could help your business, then the tool finder to pick an app and the cost calculator to check what it will cost. For content work, the prompt generator, headline generator, word counter and summarizer cover planning to publishing. For money decisions, run the same numbers through the mortgage, loan and compound interest calculators to compare borrowing against saving.
FAQ
Are these tools really free?
Yes. They have no sign-up, no paywall and no usage limit. They run in your browser, so they cost us nothing to run per use.
Do the tools use ChatGPT or another AI model?
Most don't. They're lightweight tools built with clear formulas, classic algorithms and features already built into your browser, so they're instant and private. The AI Image, Text and Story Generators are different: they send your prompt to the free Pollinations AI service to create the result, so don't type private information into them.
Are the finance and health calculators advice?
No. They use standard published formulas and show their working, but they're estimates. Check with a qualified professional before making big money or health decisions.
Can I suggest a new tool?
Yes, please do. Use the contact form at the bottom of any page and tell us what would save you time.
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