Free Online Tools That Just Work

714 fast, private tools — calculators, PDF, images, money, health, SEO, developer tools and more. Everything runs in your browser: no signup, no uploads, no watermarks.

🗂️ Browse by category

Pick a category and see every free tool inside it — the fastest way to find what you need.

Calculators

96 free tools — browse all

Text Tools

60 free tools — browse all

Generators

31 free tools — browse all

Image Tools

20 free tools — browse all

PDF Tools

37 free tools — browse all

Social & Video

89 free tools — browse all

Travel & Documents

15 free tools — browse all

Money & Business

204 free tools — browse all

Health & Fitness

41 free tools — browse all

SEO & Marketing

13 free tools — browse all

Developer Tools

46 free tools — browse all

Style & Shopping

11 free tools — browse all

Link & Bio Tools

9 free tools — browse all

Home & Decor

29 free tools — browse all

Gifts & Occasions

9 free tools — browse all

Faith & Lunar

4 free tools — browse all

🎯 Find tools by your role

Pick your job — here are the exact tools people like you use most (all free, all in-browser).

Role	Best tools
Digital marketer	Meta tags • UTM builder • Hashtags • Readability • Keyword density • Engagement rate
Student / researcher	Citations • Word counter • GPA ⇄ % • Date difference • Case converter
Freelancer / small business	Invoices • GST/VAT • Margins • EMI • Time zones
Developer	JSON • Regex • Base64 • JWT • Cron • UUID
Content creator	Thumbnails • Fancy text • Insta line-breaks • QR codes • YT earnings
Traveler / immigrant	Visa photo check • Flight compensation • Time zones
Health & family	TDEE calories • BMI • Due date • Ovulation

🛡️ The no-upload standard (compare us)

Tool	Runs offline?	No account	Files never uploaded
Merge PDF	✅ (after load)	✅	✅ pdf-lib in your browser
Image compressor	✅ (after load)	✅	✅ Canvas API, local
Visa photo checker	✅ (after load)	✅	✅ pixels never leave device
QR generator	✅ (after load)	✅	✅ no server round-trip
JSON formatter	✅ (after load)	✅	✅ text stays local

How we test this claim: load the page, go offline, and keep working — everything here is processed by your own device.

Calculators

Everyday calculators: age, percentage, loan EMI, BMI — instant and private.

CV Maker (Academic Style)

Draft a reverse-chronological academic CV for UK and EU applications: profile, core skills…

Coin Flip Online

Free coin flipper: flip 1–1000 coins, see heads/tails counts and percentages — crypto-fair…

Online Stopwatch

Free online stopwatch: start/stop/lap/reset with millisecond precision and a lap table — w…

Online Dice Roller

Free dice roller: roll any dice notation (2d20+5, 4d6) with crypto-fair randomness — table…

Yes or No Picker

Can't decide? Free yes/no picker: cryptographically fair random answers — big result, flip…

Age Calculator

Free age calculator: find your exact age in years, months and days from your date of birth…

EMI / Loan Calculator

Free EMI calculator: compute monthly loan payments, total interest and total repayment for…

BMI Calculator

Free BMI calculator for metric and imperial units. See your Body Mass Index and healthy we…

Area Converter

Free area converter: sq m, sq ft, acres, hectares, sq miles, sq km, bigha-style conversion…

All 96 tools →

Text Tools

Word counter, case converter and text cleanup utilities for writers and students.

Word Counter

Free word counter: live count of words, characters (with and without spaces), sentences, p…

Text Toolkit

Free text toolkit: remove duplicate lines, sort, trim, remove empty lines, number lines, e…

Reverse Text Generator

Free reverse text: reverse letters, word order or lines — instant, offline, copy in one ta…

Rhyme Finder

Find words that rhyme with any English word — perfect rhymes and near rhymes ranked by sou…

Wordle Solver

Mark each letter as gray, yellow, or green and instantly get every matching five-letter wo…

Case Converter

Free case converter: switch text between UPPERCASE, lowercase, Title Case, Sentence case, …

Text to Speech

Free text-to-speech that reads any text aloud using your device's built-in voices. Adjust …

Resume Builder

Build a clean, professional resume online free: fill the form, watch the live preview, the…

Speech to Text

Convert speech to text online free using your browser's built-in recognition engine. Real-…

All 60 tools →

Generators

QR codes, strong passwords and WhatsApp click-to-chat links in one click.

Online Metronome

A precise 30–240 BPM metronome with tap tempo, 2/4 to 6/8 time signatures, accented downbe…

Wheel Picker

Free spin-the-wheel random picker: add names, spin, get a fair winner. Perfect for classro…

Hobby Finder Quiz

Find a hobby that actually fits: answer six questions about your time, budget, energy and …

Wheel Spinner

Type names or prizes, spin the animated prize wheel and watch the easing slow to a winner …

Slogan / Tagline Generator

Generate 30 slogan candidates from your brand name and benefit — benefit-first, rhyme, com…

16-Type Personality Quiz

Answer 24 quick statements to map your four personality axes and get a 16-type label with …

QR Code Generator

Free QR code generator: turn links, text, WiFi or contact info into a downloadable QR code…

Barcode Generator

Generate real Code 128-B barcodes from any text as crisp vector SVG — automatic check digi…

Password Strength Checker

Check how strong your password is — entropy bits, crack-time estimate and common-password …

All 31 tools →

Image Tools

Compress, resize and convert images right in your browser — nothing is uploaded.

GIF Maker

Turn photos into an animated GIF right in your browser: reorder frames, set speed and size…

WebP to PNG Converter

Convert WebP images to PNG in bulk — decoded locally via canvas, download one file or a ZI…

Color Picker from Image

Free color picker: load an image, click any pixel — get HEX, RGB, HSL plus a matching pale…

Image Resizer

Free image resizer: resize photos to exact pixel dimensions with aspect-ratio lock. Choose…

Image Cropper

Free image cropper: drag to select, crop presets (1:1, 16:9, 4:3, free), download instantl…

Image Rotator

Free image rotator: rotate 90/180/270 or any angle, flip horizontal/vertical, download PNG…

Meme Generator

Free meme maker: classic top/bottom Impact-style text on any image, draggable position, do…

Image Upscaler

Upscale images 2x or 4x online free — high-quality browser-side enlargement with sharpenin…

Image Converter (WebP → JPG)

Free image converter: convert WebP to JPG or PNG (and vice versa) in your browser. Fixes '…

All 20 tools →

PDF Tools

Merge PDFs, convert JPG to PDF and extract pages — free, fast and 100% private.

Sign PDF

Draw your signature and place it on any PDF page — all in your browser with zero uploads. …

Merge PDF

Free PDF merger: combine multiple PDF files into one document, in your chosen order. 100% …

Split PDF

Split a PDF into separate files by page ranges: chapter 1-5, 6-9… Each range downloads as …

JPG to PDF

Convert JPG and PNG images to a single PDF free — in your browser. Photos never upload, pe…

Rotate PDF

Rotate PDF pages permanently: fix sideways or upside-down scans in seconds. Rotate all pag…

PDF to JPG

Convert PDF pages to high-quality JPG images right in your browser. Pick quality and resol…

Unlock PDF (Remove Password)

Remove the password from a PDF you own: enter the password once, get an unrestricted copy …

PDF Reader Online

Read PDF files online free: open any PDF right in your browser with page navigation and zo…

PDF to PNG Converter

Convert PDF to PNG online free: turn every page into a crisp PNG image and download them a…

All 37 tools →

Travel & Documents

Flight compensation checker and visa photo compliance tools for Tier-1 travelers.

Jet Lag Advisor

Free jet lag advisor: time zones crossed in, recovery days and adaptation tips out — east-…

Visa & DV Lottery Photo Checker

Free visa photo checker: validate your photo against US DV Lottery (600×600px, ≤240KB), US…

Time Zone Converter

Free time zone converter: convert any time between UTC, New York, London, Berlin, Dubai, K…

EV vs Gas Calculator

Free EV vs gas calculator: compare driving costs per mile and per year — home charging rat…

Tire Size Calculator

Compare two tire specs (e.g. 205/55R16 vs 225/45R17): overall diameter, width, and the exa…

Road Trip Fuel Cost Splitter

Distance × consumption ÷ 100 × price, split per rider — the back-seat argument, settled. F…

Passport Photo Resizer

Resize a photo to passport specs — US 2×2 in, UK/EU 35×45 mm, India size — plus a 4×6 prin…

Layover Time Calculator — Is My Connection Realistic?

Domestic connections need ~45 min, international ~90 (immigration), plus 20 if you must re…

Travel Budget Calculator

Free travel budget calculator: days, daily spend style, flights and activities — total tri…

All 15 tools →

Money & Business

Invoices, GST/VAT, profit margins, compound interest and salary-side calculators for freelancers and small business.

CD Calculator

Project a certificate of deposit to maturity with daily, monthly or quarterly compounding …

Tip Calculator

Free tip calculator: add a tip percentage, split the bill between friends and see exactly …

ROI Calculator

Free ROI calculator: gain minus cost over cost, plus annualized ROI for multi-year investm…

IBAN Validator

Validate IBANs free with the official mod-97 algorithm and per-country length rules. Insta…

LTV Calculator

Free LTV calculator: loan and property value in, loan-to-value ratio and CLTV out - 80% PM…

ARR Calculator

Turn MRR into ARR with a 12-month run-rate projection, net revenue retention and growth ra…

FSA Calculator

Project your FSA balance paycheck by paycheck and see exactly what you could forfeit at ye…

CAC Calculator

Add up every sales and marketing dollar, divide by new customers won, and see CAC plus gro…

CAGR Calculator

Free CAGR calculator: beginning value, ending value, years → exact compound annual growth …

All 204 tools →

Health & Fitness

TDEE calories, pregnancy due date and ovulation calculators — private, instant and free.

Life in Weeks Visualizer

Visualize a 90-year life as 4,680 weekly boxes with the weeks you've lived filled in — the…

Skin Type Quiz + Routine Order

Four honest signals (shine, tightness, reactivity, T-zone) map to the five classic skin ty…

A1C to Average Glucose Calculator

Convert A1C to estimated average glucose in mg/dL or mmol/L and back, with ADA context ban…

Private Period Tracker

Log period start dates and flow, get next-cycle predictions and a fertile-window estimate,…

GFR Calculator (CKD-EPI 2021)

Estimate eGFR with the CKD-EPI 2021 race-free creatinine equation, see your CKD stage G1–G…

BSA Calculator

Calculate body surface area in m² with Du Bois and Mosteller, plus Haycock and Gehan-Georg…

Running Pace Calculator

Free running pace calculator: distance and finish time gives pace per km/mile, speed, and …

Macro Calculator

Free macro calculator: enter your daily calories and goal (cut, maintain, bulk) to get exa…

Heart Rate Zone Calculator

Free heart-rate zone calculator: Tanaka max HR, resting-HR Karvonen option, all 5 training…

All 41 tools →

SEO & Marketing

Meta tags, UTM links, robots.txt, slugs, keyword density and readability — the on-page SEO toolkit.

UTM Link Builder

Free UTM link builder: add utm_source, utm_medium and campaign parameters to any URL for c…

URL Slug Generator

Free URL slug generator: turn any title into a clean, lowercase, SEO-friendly URL slug. Ac…

AI Bio Generator

Free bio generator: create a polished Instagram, TikTok, X or LinkedIn bio in seconds — na…

Hashtag Generator

Free hashtag generator: create keyword-based hashtag sets for Instagram, TikTok, YouTube, …

Meta Tag Generator

Free meta tag generator: build SEO title, description, keywords, canonical, Open Graph and…

Readability Checker

Free readability checker: score your text with the Flesch Reading Ease test, average sente…

Robots.txt Generator

Free robots.txt generator: allow or block search engines, disallow private folders, add si…

AI Caption Generator

Free caption generator for Instagram, TikTok, LinkedIn and X: topic + tone in, scroll-stop…

Cold Email Generator

Free cold email generator: goal and context in — short, personal outreach emails out (sale…

All 13 tools →

Developer Tools

JSON formatter, regex tester, Base64, hashes, JWT, cron and more — built for daily dev work.

DNS Lookup

Look up DNS records free: A, AAAA, MX, TXT, NS, CNAME and more via DNS-over-HTTPS. Instant…

JWT Decoder

Free JWT decoder: decode JSON Web Token header and payload, inspect expiry (exp) and issue…

JSON to CSV Converter

Free JSON→CSV: paste an array of objects, get clean CSV with auto-detected headers; swap t…

CSV to JSON Converter

Free CSV→JSON: paste CSV, get a clean JSON array with headers as keys — RFC quoting handle…

Webcam Test

Test your webcam in the browser with a live mirrored preview, resolution and FPS readout, …

Regex Tester

Free regex tester: test JavaScript regular expressions with live match highlighting and ca…

HTML Encoder / Decoder

Free HTML encoder/decoder: escape <, >, &, quotes to entities and back — instant, bidirect…

WHOIS Lookup (RDAP)

Look up any domain or IP address free: registrar, registration and expiry dates, status co…

XML Formatter / Beautifier

Free XML formatter: indent messy XML for reading, or minify it for transport — instant, lo…

All 46 tools →

Style & Shopping

Try before you buy: virtual dress, shoe, bag and lipstick try-on, colour combinations and hairstyle picks — your photo never leaves the browser.

Watch Size Fit Guide

Case diameter should track wrist circumference: under 15 cm wrists suit 34–38 mm, 17–19 cm…

3D Product Viewer (GLB/GLTF)

Inspect 3D product models in your browser: load a .glb or .gltf file, orbit, zoom and meas…

Bra Size Converter (US ⇄ UK ⇄ EU)

Band conversion adds 15 for EU sizing; cups diverge after D (US DD = UK DD = EU E). A star…

Ring Size Converter

Measure your finger with a string or an existing ring, enter millimetres, and get your rin…

Virtual Dress Try-On

Try dresses online free: upload your photo, overlay any dress image, then adjust size, pos…

Virtual Shoes Try-On

See shoes on your own feet before buying: upload a photo of your feet, overlay the shoe im…

Lipstick Shade Finder

Find your best lipstick shades: pick your skin depth and undertone (warm, cool or neutral)…

Outfit Colour Combiner

Build outfits that actually match: pick your base piece, get scientifically harmonised col…

Virtual Handbag Try-On

Check a handbag's real proportions on you: upload a photo, overlay the bag, scale it to th…

All 11 tools →

Link & Bio Tools

Shorten links, build a Linktree-style bio page and turn any URL into a QR code — all client-side, nothing stored.

Link Shortener (No Signup, No Expiry)

Free link shortener with two honest modes: a private serverless portable link (destination…

QR Code Generator for Links

Turn any link into a high-quality QR code: choose size and error correction, download a cr…

WiFi QR Code Generator

Encodes the standard WIFI: payload (type, SSID, escaped password) into a scannable QR — gu…

vCard Contact QR Generator

Builds a real vCard 3.0 payload — scanning saves the contact straight into the phone's add…

QR Code Batch Generator

Up to 24 QR codes in one pass — table tents, asset tags, classroom stations. All rendered …

Link-in-Bio Builder (Linktree Alternative)

Build a Linktree-style bio page in minutes: add your links, pick a theme, preview live, th…

Link Click Counter (Local, No Analytics)

A privacy-first click tally stored only in this browser's localStorage — test CTA placemen…

QR Code Scanner from Image

Scan a QR code from a photo or screenshot — decoded text appears instantly with one-tap co…

Social Handle Availability Checker

Honest by design: platforms don't allow silent availability APIs, so the tool builds every…

All 9 tools →

Home & Decor

Preview wallpapers, paint colours and furniture in your own room photo before you spend a rupee.

BTU Calculator

Enter room size, ceiling height, insulation and sun to get a real cooling and heating BTU/…

Sod Calculator

Enter lawn dimensions or odd-shaped pieces with a waste margin to get exact sod pallets an…

Mulch Calculator

Enter bed size and depth to get cubic yards, 2 cu ft bag counts and cost for shrubs, trees…

Fence Calculator

Enter perimeter or length and width to get post count, rail footage, picket math per secti…

Grout Calculator

Enter tile size, spacer width, thickness and area to get grout kilograms per square meter,…

Gravel Calculator

Enter area, depth and stone type to get cubic yards, tons with the conversion shown and du…

Decking Calculator

Enter deck size and board width to get board count, joists at 16 in on center, a screw est…

Topsoil Calculator

Enter bed size and depth to get topsoil in cubic yards, cubic meters, tons and 40-pound ba…

Concrete Calculator

Calculate cubic yards, 80/60/40 lb bag counts and bag-versus-delivered cost for slabs, rou…

All 29 tools →

Gifts & Occasions

Gift finders, occasion planners and theme generators for birthdays, weddings, anniversaries and every celebration.

Gift Idea Finder

Find a gift that actually lands: pick the person, the occasion, your budget and their inte…

Baby Gender Predictor (Fun)

Try the traditional Chinese lunar chart plus six old-wives signs for a playful guess — pur…

Secret Santa Generator

Paste names and draw a fair Secret Santa pairing where nobody gets themselves (a proper de…

Event Budget Allocator

Planner-standard percentage splits (40% venue/catering down to a 5% buffer) applied to you…

Anniversary Milestone Gift Finder

The traditional and modern anniversary material lists (jewelers' standard) — a ready-made …

RSVP Headcount → Catering Quantities

Caterers count kids as half covers, apply a service-style multiplier (buffets run 15% heav…

Wedding Day-Of Timeline Generator

Back-planned from your ceremony time, with dinner duration scaled to guest count (≈5 min p…

Baby Shower Budget Calculator

Per-head budgeting with a style multiplier plus a 25% games-and-favors line — the quick wa…

Wedding Gift Amount Calculator

A tasteful, region-aware range for wedding gift money based on your relationship to the co…

All 9 tools →

Faith & Lunar

Prayer times, Hijri dates and inheritance maths — calculated privately in your browser.

Moon Phase Calculator

Get any date's moon phase with illumination percentage, emoji and the next new and full mo…

Hijri Gregorian Converter

Convert any date between the Hijri (Islamic) calendar and the Gregorian calendar in both d…

Faraid Share Calculator

Estimate Qur'anic inheritance shares for common family configurations (spouse, sons, daugh…

Prayer Times Calculator

Calculate today's five prayer times (Fajr, Sunrise, Dhuhr, Asr, Maghrib, Isha) for 17+ cit…

All 4 tools →

📚 Free guides (from our research)

DV Lottery Photo Requirements (2026): The Complete 600×…

Exact DV lottery photo rules: 600×600 pixels, under 240KB, head 50–69%, white background. …

EU261 / UK261 Flight Compensation: The Free DIY Claim G…

Delayed 3+ hours, cancelled or denied boarding in the EU/UK? How much you're owed (€250–60…

No-Upload Online Tools: The Privacy-First Way to Get Th…

Server-based tools copy your files to unknown computers. Browser-based (client-side) tools…

GST & VAT for Freelancers: The Plain-English Guide (202…

Freelancer's plain-English guide to GST/VAT: adding vs removing tax, reverse charge, what …

The Everyday Developer Cheat-Sheet: JSON, Base64, JWT, …

The practical dev cheat-sheet: pretty-print JSON, decode Base64 (UTF-8 safe), read JWT cla…

Why Toolfyra is different

100% private — your files and data are processed on your device and never uploaded.
Blazing fast — no frameworks, no bloated pages; loads instantly even on slow connections.
Truly free — no accounts, no watermarks, no daily limits.
Mobile first — designed for phones, works everywhere.

FAQ

Are these tools really free?

Yes — every tool is 100% free with no signup, no watermarks and no daily limits.

Do you store my files?

No. All processing (PDF, images, calculations) happens locally in your browser using JavaScript. Your files never reach our servers.

Does it work on iPhone and Android?

Yes — the site is mobile-first and works in any modern browser, including Safari and Chrome on mobile.