# Toolfiddle > Toolfiddle is a free library of 143 online tools that run in the browser. For almost every > tool, the work happens on the visitor's own device: files and text are not sent to a server, > logged, or stored. Every tool is free, needs no sign-up, and has no daily limit. ## Principles - On-device processing: the work happens client-side in JavaScript. Files and text stay on the device. - Free with no limits: no account, no email, no daily cap, no paywalled features, no watermarks. - Honest about limits: where a tool needs a one-time download (the background remover's cutout model, the OCR language data) or a live rate (the currency converter), the page says so plainly rather than claiming more than it does. - Fast and light: minimal scripts, designed around Core Web Vitals. ## Tools ### Everyday calculators - [Percentage Calculator](https://toolfiddle.com/percentage-calculator): Find a percentage, change, increase, decrease, and reverse percentages. - [Age Calculator](https://toolfiddle.com/age-calculator): Work out an exact age in years, months, and days from a birth date. - [BMI Calculator](https://toolfiddle.com/bmi-calculator): Check body mass index in metric or imperial with clear category guidance. - [Loan & EMI Calculator](https://toolfiddle.com/loan-emi-calculator): See your monthly payment, total interest, and full amortization. - [Income Tax Calculator](https://toolfiddle.com/income-tax-calculator): Estimate take-home pay from gross income, deductions, and brackets. - [Mortgage Calculator](https://toolfiddle.com/mortgage-calculator): Calculate a home loan payment with principal, interest, taxes, insurance. - [Compound Interest Calculator](https://toolfiddle.com/compound-interest-calculator): Project how savings grow with compound interest over time. - [Discount Calculator](https://toolfiddle.com/discount-calculator): Work out a sale price and what you save from any percent off. - [Tip Calculator](https://toolfiddle.com/tip-calculator): Calculate a tip and split the bill between any number of people. - [Fraction Calculator](https://toolfiddle.com/fraction-calculator): Add, subtract, multiply, divide, and simplify fractions with steps. - [GPA Calculator](https://toolfiddle.com/gpa-calculator): Turn letter grades and credit hours into a weighted or unweighted GPA. - [Calorie Calculator](https://toolfiddle.com/calorie-calculator): Estimate daily calories for losing, maintaining, or gaining weight. - [TDEE Calculator](https://toolfiddle.com/tdee-calculator): Calculate total daily energy expenditure from your stats and activity. - [Pregnancy Due Date Calculator](https://toolfiddle.com/pregnancy-due-date-calculator): Estimate a due date from last period, conception, or ultrasound. - [Days Between Dates](https://toolfiddle.com/days-between-dates-calculator): Count the days, weeks, and months between any two dates. - [Date Calculator](https://toolfiddle.com/date-calculator): Add or subtract days, weeks, months, or years from a date. ### Converters - [Currency Converter](https://toolfiddle.com/currency-converter): Convert between world currencies at clear mid-market style rates. - [Unit Converter](https://toolfiddle.com/unit-converter): Convert length, weight, temperature, volume, area, speed, and more. - [Time Zone Converter](https://toolfiddle.com/time-zone-converter): Convert a time between zones and plan meetings across the world. - [Case Converter](https://toolfiddle.com/case-converter): Change text to uppercase, lowercase, title case, and developer cases. ### PDF tools - [Image to PDF](https://toolfiddle.com/image-to-pdf): Combine any mix of images into a single PDF document. - [JPG to PDF](https://toolfiddle.com/jpg-to-pdf): Turn JPG photos and scans into one clean PDF file. - [Photo to PDF](https://toolfiddle.com/photo-to-pdf): Gather phone photos into a shareable, printable PDF. - [PDF to Image](https://toolfiddle.com/pdf-to-image): Export every page of a PDF as an image in your chosen format. - [PDF to JPG](https://toolfiddle.com/pdf-to-jpg): Convert PDF pages into compact JPG images for easy sharing. - [PDF to PNG](https://toolfiddle.com/pdf-to-png): Convert PDF pages into lossless PNG images with sharp text. - [PDF Merge](https://toolfiddle.com/pdf-merge): Combine several PDFs into one and reorder the pages. - [PDF Compress](https://toolfiddle.com/pdf-compress): Shrink a PDF file size to fit email and upload limits. - [PDF to Word](https://toolfiddle.com/pdf-to-word): Convert a PDF into an editable Word document. ### Image editing - [Image Compressor](https://toolfiddle.com/image-compressor): Reduce photo file size while keeping the picture looking sharp. - [Resize Image](https://toolfiddle.com/resize-image): Change an image to exact pixel dimensions or by percentage. - [Image Resizer](https://toolfiddle.com/image-resizer): Batch resize images to platform sizes and device presets. - [Crop Image](https://toolfiddle.com/crop-image): Crop to a selection or a fixed aspect ratio like 1:1 or 16:9. - [Rotate Image](https://toolfiddle.com/rotate-image): Rotate a photo by 90, 180, 270, or any custom angle. - [Flip Image](https://toolfiddle.com/flip-image): Mirror an image horizontally or vertically. - [Background Remover](https://toolfiddle.com/background-remover): Remove the background from a photo and get a transparent PNG. - [Watermark Image](https://toolfiddle.com/watermark-image): Stamp a text or logo watermark onto your photos to protect them. - [Watermark Maker](https://toolfiddle.com/watermark-maker): Design a reusable transparent watermark or logo mark. - [Photo Filters](https://toolfiddle.com/photo-filters): Apply filters and adjust brightness, contrast, and color. - [Blur Image](https://toolfiddle.com/blur-image): Blur a whole image or a selected area with adjustable strength. - [Blur Face](https://toolfiddle.com/blur-face): Hide faces in a photo to protect identity before you post it. - [Censor Image](https://toolfiddle.com/censor-image): Redact names, numbers, and sensitive details with blur or boxes. - [Grayscale Image](https://toolfiddle.com/grayscale-image): Convert a photo to grayscale while keeping every shade of gray. - [Black & White Image](https://toolfiddle.com/black-and-white-image): Create a monochrome or true black-and-white version of a photo. - [Pixelate Image](https://toolfiddle.com/pixelate-image): Turn an image or region into blocky pixels for a censor or retro look. - [Add Text to Image](https://toolfiddle.com/add-text-to-image): Add captions, titles, and quotes to a photo with full control. ### Image format converters - [HEIC to JPG](https://toolfiddle.com/heic-to-jpg): Convert iPhone HEIC photos to JPG that opens everywhere. - [HEIC to PNG](https://toolfiddle.com/heic-to-png): Convert HEIC to lossless PNG for editing and transparency. - [WebP to JPG](https://toolfiddle.com/webp-to-jpg): Turn downloaded WebP images into JPG that any app can open. - [WebP to PNG](https://toolfiddle.com/webp-to-png): Convert WebP to PNG and keep transparency for editing. - [PNG to JPG](https://toolfiddle.com/png-to-jpg): Convert PNG to smaller JPG for email and uploads. - [JPG to PNG](https://toolfiddle.com/jpg-to-png): Convert JPG to a lossless PNG copy for editing. - [JPG to WebP](https://toolfiddle.com/jpg-to-webp): Shrink JPG photos to WebP for faster web pages. - [PNG to WebP](https://toolfiddle.com/png-to-webp): Compress PNG graphics to WebP while keeping transparency. - [AVIF to JPG](https://toolfiddle.com/avif-to-jpg): Convert the modern AVIF format to widely compatible JPG. - [JFIF to JPG](https://toolfiddle.com/jfif-to-jpg): Rename and re-save JFIF downloads as standard JPG. - [Image to SVG](https://toolfiddle.com/image-to-svg): Vectorize any raster image into a scalable SVG. - [PNG to SVG](https://toolfiddle.com/png-to-svg): Turn a PNG logo or icon into a clean vector SVG. - [JPG to SVG](https://toolfiddle.com/jpg-to-svg): Trace a simple JPG graphic into an SVG outline. - [Vectorize Image](https://toolfiddle.com/vectorize-image): Convert artwork into cut-ready vector paths for makers. - [PNG to ICO](https://toolfiddle.com/png-to-ico): Convert a PNG into an ICO icon file. - [ICO Converter](https://toolfiddle.com/ico-converter): Convert to and from the ICO Windows icon format. ### AI & photo enhancement - [AI Image Upscaler](https://toolfiddle.com/ai-image-upscaler): Enlarge a small image 2x or 4x while adding plausible detail. - [Image Enhancer](https://toolfiddle.com/image-enhancer): Improve sharpness, color, lighting, and noise in one tap. - [Unblur Image](https://toolfiddle.com/unblur-image): Sharpen a soft or slightly out-of-focus photo. - [Increase Image Resolution](https://toolfiddle.com/increase-image-resolution): Raise pixel dimensions and print size the smart way. ### Image utilities - [Image to Text (OCR)](https://toolfiddle.com/image-to-text): Extract text from a screenshot, scan, or photo with OCR. - [Color Picker From Image](https://toolfiddle.com/color-picker-from-image): Pick any pixel color from an image and read its HEX and RGB. - [Palette Extractor](https://toolfiddle.com/palette-extractor): Pull a full color palette from any image for design work. - [EXIF Viewer](https://toolfiddle.com/exif-viewer): Inspect a photo's EXIF data, including camera settings and GPS. - [EXIF Remover](https://toolfiddle.com/exif-remover): Strip EXIF and GPS data from photos before sharing. - [Metadata Remover](https://toolfiddle.com/metadata-remover): Clear all hidden metadata from images and files. - [Favicon Generator](https://toolfiddle.com/favicon-generator): Create a complete favicon set for your website. - [Passport Photo Maker](https://toolfiddle.com/passport-photo-maker): Make a compliant passport or visa photo to the right specs. - [Passport Size Photo Maker](https://toolfiddle.com/passport-size-photo-maker): Size and print sheets of passport size photos for documents. ### Generators & randomizers - [QR Code Generator](https://toolfiddle.com/qr-code-generator): Create QR codes for links, Wi-Fi, contact cards, and text. - [Barcode Generator](https://toolfiddle.com/barcode-generator): Generate scannable barcodes for products and inventory. - [Password Generator](https://toolfiddle.com/password-generator): Build strong, random passwords and passphrases on your device. - [Wheel of Names](https://toolfiddle.com/wheel-of-names): Spin a wheel to pick a random name or winner. - [Random Picker](https://toolfiddle.com/random-picker): Pick one or many random winners from a list. - [Coin Flip](https://toolfiddle.com/coin-flip): Flip a virtual coin for a quick heads-or-tails decision. - [Dice Roller](https://toolfiddle.com/dice-roller): Roll one or more dice, from a d6 to a d20 and beyond. - [Random Number Generator](https://toolfiddle.com/random-number-generator): Generate random numbers in any range, with or without repeats. ### Text, writing & media - [Word Counter](https://toolfiddle.com/word-counter): Count words, characters, sentences, and reading time as you type. - [Color Picker](https://toolfiddle.com/color-picker): Pick colors and read HEX, RGB, and HSL values. - [Text to Speech](https://toolfiddle.com/text-to-speech): Turn written text into natural spoken audio in your browser. - [Screen Recorder](https://toolfiddle.com/screen-recorder): Record your screen with audio, no install required. - [GIF Maker](https://toolfiddle.com/gif-maker): Create an animated GIF from a video clip or images. - [Meme Generator](https://toolfiddle.com/meme-generator): Add top and bottom text to an image to make a meme. - [JSON Formatter](https://toolfiddle.com/json-formatter): Format, validate, and minify JSON right in the browser. - [Logline Helper](https://toolfiddle.com/logline-helper): Craft a sharp one-sentence logline for your story. - [Beat Sheet Helper](https://toolfiddle.com/beat-sheet-helper): Structure a screenplay or novel with clear story beats. - [Script Runtime Estimator](https://toolfiddle.com/script-runtime-estimator): Estimate screen runtime from a script's page count. - [Podcast Timestamp Formatter](https://toolfiddle.com/podcast-timestamp-formatter): Format clean timestamp lists for podcast show notes. - [Podcast Chapter Formatter](https://toolfiddle.com/podcast-chapter-formatter): Build chapter markers for Apple, Spotify, and YouTube. ### Timers & time - [Countdown Timer](https://toolfiddle.com/countdown-timer): Count down to a date, event, or a custom duration. - [Stopwatch](https://toolfiddle.com/stopwatch): Measure elapsed time with laps and splits. - [Timer](https://toolfiddle.com/timer): Set a countdown timer with an alarm for any task. ### Business & selling - [Resume Builder](https://toolfiddle.com/resume-builder): Build a clean, ATS-friendly resume and export it to PDF. - [Invoice Generator](https://toolfiddle.com/invoice-generator): Create a professional invoice and export it to PDF. - [Project Quote Builder](https://toolfiddle.com/project-quote-builder): Build a firm, client-ready quote with line items and tax. - [Project Estimate Builder](https://toolfiddle.com/project-estimate-builder): Put together a preliminary cost and effort estimate range. ### Fitness & strength - [Powerlifting Attempt Planner](https://toolfiddle.com/powerlifting-attempt-planner): Plan opener, second, and third attempts for a meet. - [Wilks Calculator](https://toolfiddle.com/wilks-calculator): Score a lift relative to bodyweight with the Wilks formula. - [DOTS Calculator](https://toolfiddle.com/dots-calculator): Compare strength across bodyweights with the modern DOTS score. - [Warm Up Ladder Planner](https://toolfiddle.com/warm-up-ladder-planner): Build a warm-up ramp from the bar to your working weight. - [Plate Loading Calculator](https://toolfiddle.com/plate-loading-calculator): See exactly which plates to load for a target barbell weight. ### Home, hobby & craft - [Houseplant Watering Calculator](https://toolfiddle.com/houseplant-watering-calculator): Build a watering and care schedule for your houseplants. - [Aquarium Stocking Calculator](https://toolfiddle.com/aquarium-stocking-calculator): Estimate how many fish your tank can safely hold. - [Reef Dosing Calculator](https://toolfiddle.com/reef-dosing-calculator): Dose calcium, alkalinity, and magnesium for a reef tank. - [Paint Cross Reference](https://toolfiddle.com/paint-cross-reference-converter): Match a paint color to the closest shade in another range. - [Bread Bake Timeline](https://toolfiddle.com/bread-bake-timeline-scheduler): Plan a bread bake backward from when you want it ready. - [Sourdough Proofing Scheduler](https://toolfiddle.com/sourdough-proofing-scheduler): Schedule a sourdough bake around temperature and cold proofing. ### Sports & coaching - [Disc Golf Round Rating](https://toolfiddle.com/disc-golf-round-rating-calculator): Estimate the rating of a disc golf round. - [League Handicap Calculator](https://toolfiddle.com/league-handicap-calculator): Calculate a bowling or golf league handicap. - [Fair Play Lineup Generator](https://toolfiddle.com/fair-play-lineup-generator): Build a lineup that gives every player fair playing time. - [Substitution Rotation Generator](https://toolfiddle.com/substitution-rotation-generator): Plan a game's substitution rotation interval by interval. ### Study & exams - [JAMB & WAEC Weak Topic Diagnostic](https://toolfiddle.com/jamb-waec-weak-topic-diagnostic): Find weak topics to focus JAMB and WAEC revision. - [CBT Practice Simulator](https://toolfiddle.com/cbt-practice-simulator): Practice under real computer-based test conditions. - [JLPT Level Readiness Estimator](https://toolfiddle.com/jlpt-level-readiness-estimator): Estimate which JLPT level you are ready to sit. - [JLPT Diagnostic Quiz](https://toolfiddle.com/jlpt-diagnostic-quiz): Take a quick quiz to place your JLPT level and gaps. ### Driving, RV & trucking - [HOS Recap Calculator](https://toolfiddle.com/hos-recap-calculator): Track rolling Hours of Service under the 60/7 and 70/8 limits. - [34-Hour Restart Calculator](https://toolfiddle.com/34-hour-restart-calculator): Time a 34-hour restart to reset your weekly hours. - [RV Payload Calculator](https://toolfiddle.com/rv-payload-calculator): See how much cargo, water, and gear you can still load. - [GVWR Calculator](https://toolfiddle.com/gvwr-calculator): Check your loaded weight against the vehicle rating. - [CCC Weight Calculator](https://toolfiddle.com/ccc-weight-calculator): Work out an RV's cargo carrying capacity from the sticker. ### Streaming - [Twitch Subathon Countdown](https://toolfiddle.com/twitch-subathon-countdown): Run a subathon clock that subs and donations extend on Twitch. ### Planning & specialized - [Islamic Inheritance Calculator](https://toolfiddle.com/islamic-inheritance-calculator): Work out estate shares under Islamic inheritance rules. ### Personality & self-discovery - [16 Personality Types Test](https://toolfiddle.com/16-personality-types-test): Find your four-letter type across the four classic dichotomies. - [Enneagram Test](https://toolfiddle.com/enneagram-test): Discover your Enneagram type, wing, and center of intelligence. - [Big Five Personality Test](https://toolfiddle.com/big-five-personality-test): Measure the five OCEAN traits on the most research-backed model. - [Attachment Style Quiz](https://toolfiddle.com/attachment-style-quiz): See whether you attach in a secure, anxious, avoidant, or fearful way. - [Love Language Quiz](https://toolfiddle.com/love-language-quiz): Learn how you most like to give and receive care. - [Career Aptitude Test](https://toolfiddle.com/career-aptitude-test): Get your Holland Code and the career fields that fit it. - [DISC Personality Test](https://toolfiddle.com/disc-personality-test): Find your workplace style across D, I, S, and C. - [Brand Archetype Quiz](https://toolfiddle.com/brand-archetype-quiz): Discover your brand's archetype for voice and positioning. - [IQ Test](https://toolfiddle.com/iq-test): A free practice cognitive test, honest and paywall-free. ### Astrology & numerology - [Natal Chart Calculator](https://toolfiddle.com/natal-chart-calculator): Calculate your full Western birth chart from your birth details. - [Kundli (Vedic Chart)](https://toolfiddle.com/kundli): Generate a Vedic birth chart with dashas and matchmaking. - [Human Design Chart](https://toolfiddle.com/human-design-chart): Get your Type, Strategy, Authority, and Profile. - [Numerology Calculator](https://toolfiddle.com/numerology-calculator): Find your life path, expression, and soul urge numbers. - [Chinese Zodiac & BaZi](https://toolfiddle.com/chinese-zodiac): Find your animal sign, element, and Four Pillars. - [Synastry Calculator](https://toolfiddle.com/synastry-calculator): Compare two birth charts for relationship compatibility. ## Pages - [About](https://toolfiddle.com/about): Who builds Toolfiddle and why. - [How we test](https://toolfiddle.com/how-we-test): How tools are checked for correctness before launch. - [Privacy](https://toolfiddle.com/privacy): The privacy policy — no uploads, no tracking of tool inputs. - [Contact](https://toolfiddle.com/contact): How to reach us or suggest a tool.