Trusted by 40,000+
people every month
Free online tools that run in your browser
Calculators, converters, and PDF and image tools. No sign-up, no upload, and your files never leave your device.
Rated by 12,000+ people across every tool
Your files never leave your device
Every tool runs in your browser using your own processor. Photos, documents, and numbers are read locally, worked on locally, and handed straight back. Nothing is uploaded, stored, or logged.
Free, with no sign-up and no limits
No account, no email, and no paid tier that holds back the useful parts. No watermarks on your output and no daily counter ticking down while you work.
Instant, light, and out of your way
Because the work happens on your device, there is nothing to upload and no queue to wait in. Pages stay free of heavy tracking scripts, so they load fast and stay responsive.
Browse all 143 free tools
Grouped by what you are trying to do. Every one runs in your browser.
Percentage Calculator
Find a percentage, change, increase, decrease, and reverse percentages.
Open toolAge Calculator
Work out an exact age in years, months, and days from a birth date.
Open toolBMI Calculator
Check body mass index in metric or imperial with clear category guidance.
Open toolLoan & EMI Calculator
See your monthly payment, total interest, and full amortization.
Open toolIncome Tax Calculator
Estimate take-home pay from gross income, deductions, and brackets.
Open toolMortgage Calculator
Calculate a home loan payment with principal, interest, taxes, insurance.
Open toolCompound Interest Calculator
Project how savings grow with compound interest over time.
Open toolDiscount Calculator
Work out a sale price and what you save from any percent off.
Open toolTip Calculator
Calculate a tip and split the bill between any number of people.
Open toolFraction Calculator
Add, subtract, multiply, divide, and simplify fractions with steps.
Open toolGPA Calculator
Turn letter grades and credit hours into a weighted or unweighted GPA.
Open toolCalorie Calculator
Estimate daily calories for losing, maintaining, or gaining weight.
Open toolTDEE Calculator
Calculate total daily energy expenditure from your stats and activity.
Open toolPregnancy Due Date Calculator
Estimate a due date from last period, conception, or ultrasound.
Open toolDays Between Dates
Count the days, weeks, and months between any two dates.
Open toolDate Calculator
Add or subtract days, weeks, months, or years from a date.
Open toolCurrency Converter
Convert between world currencies at clear mid-market style rates.
Open toolUnit Converter
Convert length, weight, temperature, volume, area, speed, and more.
Open toolTime Zone Converter
Convert a time between zones and plan meetings across the world.
Open toolCase Converter
Change text to uppercase, lowercase, title case, and developer cases.
Open toolImage to PDF
Combine any mix of images into a single PDF document.
Open toolJPG to PDF
Turn JPG photos and scans into one clean PDF file.
Open toolPhoto to PDF
Gather phone photos into a shareable, printable PDF.
Open toolPDF to Image
Export every page of a PDF as an image in your chosen format.
Open toolPDF to JPG
Convert PDF pages into compact JPG images for easy sharing.
Open toolPDF to PNG
Convert PDF pages into lossless PNG images with sharp text.
Open toolPDF Merge
Combine several PDFs into one and reorder the pages.
Open toolPDF Compress
Shrink a PDF file size to fit email and upload limits.
Open toolPDF to Word
Convert a PDF into an editable Word document.
Open toolImage Compressor
Reduce photo file size while keeping the picture looking sharp.
Open toolResize Image
Change an image to exact pixel dimensions or by percentage.
Open toolImage Resizer
Batch resize images to platform sizes and device presets.
Open toolCrop Image
Crop to a selection or a fixed aspect ratio like 1:1 or 16:9.
Open toolRotate Image
Rotate a photo by 90, 180, 270, or any custom angle.
Open toolFlip Image
Mirror an image horizontally or vertically.
Open toolBackground Remover
Remove the background from a photo and get a transparent PNG.
Open toolWatermark Image
Stamp a text or logo watermark onto your photos to protect them.
Open toolWatermark Maker
Design a reusable transparent watermark or logo mark.
Open toolPhoto Filters
Apply filters and adjust brightness, contrast, and color.
Open toolBlur Image
Blur a whole image or a selected area with adjustable strength.
Open toolBlur Face
Hide faces in a photo to protect identity before you post it.
Open toolCensor Image
Redact names, numbers, and sensitive details with blur or boxes.
Open toolGrayscale Image
Convert a photo to grayscale while keeping every shade of gray.
Open toolBlack & White Image
Create a monochrome or true black-and-white version of a photo.
Open toolPixelate Image
Turn an image or region into blocky pixels for a censor or retro look.
Open toolAdd Text to Image
Add captions, titles, and quotes to a photo with full control.
Open toolHEIC to JPG
Convert iPhone HEIC photos to JPG that opens everywhere.
Open toolHEIC to PNG
Convert HEIC to lossless PNG for editing and transparency.
Open toolWebP to JPG
Turn downloaded WebP images into JPG that any app can open.
Open toolWebP to PNG
Convert WebP to PNG and keep transparency for editing.
Open toolPNG to JPG
Convert PNG to smaller JPG for email and uploads.
Open toolJPG to PNG
Convert JPG to a lossless PNG copy for editing.
Open toolJPG to WebP
Shrink JPG photos to WebP for faster web pages.
Open toolPNG to WebP
Compress PNG graphics to WebP while keeping transparency.
Open toolAVIF to JPG
Convert the modern AVIF format to widely compatible JPG.
Open toolJFIF to JPG
Rename and re-save JFIF downloads as standard JPG.
Open toolImage to SVG
Vectorize any raster image into a scalable SVG.
Open toolPNG to SVG
Turn a PNG logo or icon into a clean vector SVG.
Open toolJPG to SVG
Trace a simple JPG graphic into an SVG outline.
Open toolVectorize Image
Convert artwork into cut-ready vector paths for makers.
Open toolPNG to ICO
Convert a PNG into an ICO icon file.
Open toolICO Converter
Convert to and from the ICO Windows icon format.
Open toolAI Image Upscaler
Enlarge a small image 2x or 4x while adding plausible detail.
Open toolImage Enhancer
Improve sharpness, color, lighting, and noise in one tap.
Open toolUnblur Image
Sharpen a soft or slightly out-of-focus photo.
Open toolIncrease Image Resolution
Raise pixel dimensions and print size the smart way.
Open toolImage to Text (OCR)
Extract text from a screenshot, scan, or photo with OCR.
Open toolColor Picker From Image
Pick any pixel color from an image and read its HEX and RGB.
Open toolPalette Extractor
Pull a full color palette from any image for design work.
Open toolEXIF Viewer
Inspect a photo's EXIF data, including camera settings and GPS.
Open toolEXIF Remover
Strip EXIF and GPS data from photos before sharing.
Open toolMetadata Remover
Clear all hidden metadata from images and files.
Open toolFavicon Generator
Create a complete favicon set for your website.
Open toolPassport Photo Maker
Make a compliant passport or visa photo to the right specs.
Open toolPassport Size Photo Maker
Size and print sheets of passport size photos for documents.
Open toolQR Code Generator
Create QR codes for links, Wi-Fi, contact cards, and text.
Open toolBarcode Generator
Generate scannable barcodes for products and inventory.
Open toolPassword Generator
Build strong, random passwords and passphrases on your device.
Open toolWheel of Names
Spin a wheel to pick a random name or winner.
Open toolRandom Picker
Pick one or many random winners from a list.
Open toolCoin Flip
Flip a virtual coin for a quick heads-or-tails decision.
Open toolDice Roller
Roll one or more dice, from a d6 to a d20 and beyond.
Open toolRandom Number Generator
Generate random numbers in any range, with or without repeats.
Open toolWord Counter
Count words, characters, sentences, and reading time as you type.
Open toolColor Picker
Pick colors and read HEX, RGB, and HSL values.
Open toolText to Speech
Turn written text into natural spoken audio in your browser.
Open toolScreen Recorder
Record your screen with audio, no install required.
Open toolGIF Maker
Create an animated GIF from a video clip or images.
Open toolMeme Generator
Add top and bottom text to an image to make a meme.
Open toolJSON Formatter
Format, validate, and minify JSON right in the browser.
Open toolLogline Helper
Craft a sharp one-sentence logline for your story.
Open toolBeat Sheet Helper
Structure a screenplay or novel with clear story beats.
Open toolScript Runtime Estimator
Estimate screen runtime from a script's page count.
Open toolPodcast Timestamp Formatter
Format clean timestamp lists for podcast show notes.
Open toolPodcast Chapter Formatter
Build chapter markers for Apple, Spotify, and YouTube.
Open toolResume Builder
Build a clean, ATS-friendly resume and export it to PDF.
Open toolInvoice Generator
Create a professional invoice and export it to PDF.
Open toolProject Quote Builder
Build a firm, client-ready quote with line items and tax.
Open toolProject Estimate Builder
Put together a preliminary cost and effort estimate range.
Open toolPowerlifting Attempt Planner
Plan opener, second, and third attempts for a meet.
Open toolWilks Calculator
Score a lift relative to bodyweight with the Wilks formula.
Open toolDOTS Calculator
Compare strength across bodyweights with the modern DOTS score.
Open toolWarm Up Ladder Planner
Build a warm-up ramp from the bar to your working weight.
Open toolPlate Loading Calculator
See exactly which plates to load for a target barbell weight.
Open toolHouseplant Watering Calculator
Build a watering and care schedule for your houseplants.
Open toolAquarium Stocking Calculator
Estimate how many fish your tank can safely hold.
Open toolReef Dosing Calculator
Dose calcium, alkalinity, and magnesium for a reef tank.
Open toolPaint Cross Reference
Match a paint color to the closest shade in another range.
Open toolBread Bake Timeline
Plan a bread bake backward from when you want it ready.
Open toolSourdough Proofing Scheduler
Schedule a sourdough bake around temperature and cold proofing.
Open toolDisc Golf Round Rating
Estimate the rating of a disc golf round.
Open toolLeague Handicap Calculator
Calculate a bowling or golf league handicap.
Open toolFair Play Lineup Generator
Build a lineup that gives every player fair playing time.
Open toolSubstitution Rotation Generator
Plan a game's substitution rotation interval by interval.
Open toolJAMB & WAEC Weak Topic Diagnostic
Find weak topics to focus JAMB and WAEC revision.
Open toolCBT Practice Simulator
Practice under real computer-based test conditions.
Open toolJLPT Level Readiness Estimator
Estimate which JLPT level you are ready to sit.
Open toolJLPT Diagnostic Quiz
Take a quick quiz to place your JLPT level and gaps.
Open toolHOS Recap Calculator
Track rolling Hours of Service under the 60/7 and 70/8 limits.
Open tool34-Hour Restart Calculator
Time a 34-hour restart to reset your weekly hours.
Open toolRV Payload Calculator
See how much cargo, water, and gear you can still load.
Open toolGVWR Calculator
Check your loaded weight against the vehicle rating.
Open toolCCC Weight Calculator
Work out an RV's cargo carrying capacity from the sticker.
Open tool16 Personality Types Test
Find your four-letter type across the four classic dichotomies.
Open toolEnneagram Test
Discover your Enneagram type, wing, and center of intelligence.
Open toolBig Five Personality Test
Measure the five OCEAN traits on the most research-backed model.
Open toolAttachment Style Quiz
See whether you attach in a secure, anxious, avoidant, or fearful way.
Open toolLove Language Quiz
Learn how you most like to give and receive care.
Open toolCareer Aptitude Test
Get your Holland Code and the career fields that fit it.
Open toolDISC Personality Test
Find your workplace style across D, I, S, and C.
Open toolBrand Archetype Quiz
Discover your brand's archetype for voice and positioning.
Open toolIQ Test
A free practice cognitive test, honest and paywall-free.
Open toolNatal Chart Calculator
Calculate your full Western birth chart from your birth details.
Open toolKundli (Vedic Chart)
Generate a Vedic birth chart with dashas and matchmaking.
Open toolHuman Design Chart
Get your Type, Strategy, Authority, and Profile.
Open toolNumerology Calculator
Find your life path, expression, and soul urge numbers.
Open toolChinese Zodiac & BaZi
Find your animal sign, element, and Four Pillars.
Open toolSynastry Calculator
Compare two birth charts for relationship compatibility.
Open toolWhat makes ToolFiddle different
Most free tool sites make you trade something for a small favor. They stamp a watermark on the result, cap you at a couple of tasks an hour, or ask for an email before they will do anything useful. Plenty of them also upload your file to a server you know nothing about. ToolFiddle was built to be the opposite: genuinely free, actually private, and quick enough that you forget it is there.
Who uses ToolFiddle, and for what
Students and teachers lean on the calculators and study tools during term. Small business owners and freelancers put together invoices and quotes, size images for a listing, and work out margins. Photographers and designers convert image formats, strip metadata before sharing, and pull palettes from a photo. The common thread is a small, real job that should not need an account or a download.
How the tools actually work
Modern browsers can read and edit images, parse and rebuild PDFs, run text recognition, generate secure random values, and crunch heavy calculations, all without contacting a server. ToolFiddle is built on those capabilities. When you open a tool and give it a file or some numbers, the code has already reached your browser and does its work right there on the page. Nothing about that flow requires your data to be sent anywhere.
Built to be trustworthy
Trust online is earned in the details. We try to earn it by being honest about what each tool can and cannot do, by keeping the pages free of dark patterns and pushy upsells, and by making the privacy promise verifiable rather than just stated. Tools that involve health, money, law, or safety are written to be measured, and they point you to a professional when a real decision is at stake.
Frequently asked questions
The questions people actually ask about ToolFiddle.
What is ToolFiddle?
ToolFiddle is a library of free online tools that run inside your web browser. It brings calculators, converters, PDF tools, image editors, generators, and dozens of specialist utilities together in one place, so you can get a quick job done without installing software or handing over your files to a server.
Are all the tools really free?
Yes. Every tool is free with no trial, no credits, and no paid tier that unlocks the useful parts. There is nothing held back behind a subscription, because we did not build a subscription. Free here means free.
Do I need to create an account or sign up?
No. There is no account, no login, and no email to hand over. You open a tool and use it. Because nothing is tied to a profile, there is also no inbox full of marketing mail later.
Are my files and data safe? Do you upload them?
Your files and inputs stay on your device. The tools do the work in your browser using your own processor, so images, documents, and numbers are not uploaded to a server, not stored, and not logged. For anything private, that is the safest way to handle it.
How many tools does ToolFiddle have?
ToolFiddle currently offers 143 free online tools across 20 categories, and the collection keeps growing. The list on this page links to every one of them, from everyday calculators to niche utilities that are hard to find anywhere else.
Do the tools work on mobile phones and tablets?
Yes. Every tool is built to work in a modern phone, tablet, or desktop browser, and the layouts adjust to the screen. On mobile you also skip the slow upload of large photos, because the work happens on the device itself.
Do the tools work offline?
For the most part, yes. Once a tool's page has loaded, the calculating and file handling run locally, so a dropped connection will not stop you mid task. A few tools that need a live lookup are the exception, and they say so.
Is there a catch, like watermarks or daily limits?
No. We do not stamp watermarks on your output, and there is no daily cap counting down in the corner. Many free tool sites limit you or add a mark you have to pay to remove. ToolFiddle does neither.
Do I need to install anything?
No downloads and no browser extensions. ToolFiddle runs on the open web, so you reach a tool through a normal link and start using it straight away. There is nothing to update and nothing sitting on your computer between visits.
Is ToolFiddle safe from the malware some converter sites carry?
In 2025 the FBI warned that many free online converter sites were harvesting uploaded files or planting malware. ToolFiddle avoids that whole category of risk because there is no upload. If your file never reaches a server, a server cannot misuse it.
Which browsers are supported?
Any current version of the common browsers works, including Chrome, Edge, Firefox, and Safari. A small number of tools use newer browser features and will let you know if your browser does not support one, but the vast majority work everywhere.
Can I suggest a new tool?
Yes, suggestions are welcome and they shape what gets built next. Many of the more specialist tools in the library exist because someone needed them and could not find a free, private version anywhere else.