All Tools
ToolFoundry offers 65+ free online tools that run entirely in your browser. No registration, no file uploads, no server processing — your data stays private. Every tool supports 7 languages and works on both desktop and mobile.
developer
API Tester Free online API tester - Test REST APIs with GET, POST, PUT, DELETE, PATCH methods. No registration Postman alternative for developers. DNS Lookup Look up DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA) for any domain instantly. Free online DNS query and diagnostic tool for network administrators.
utilities
Archive Tool (ZIP/TAR) Compress files into ZIP/TAR/TAR.GZ/TAR.XZ and extract archives directly in your browser. Supports drag-and-drop, folder packaging (webkitdirectory).
Audio Tools
Audio Editor Edit audio locally in your browser with waveform + spectrum views, selection editing (trim/cut/copy/paste), normalize/amplify/fade, real-time effects.
Business
Barcode Generator & Labels Generate Code128/EAN-13/UPC-A barcodes and arrange them on printable label sheets. Customize columns, cell size and gaps (mm) and print directly from your. Invoice & Receipt Generator Create professional invoices and receipts with your logo, currency and taxes. Print or export PDF. Free, local and private — no sign-up required.
Developer Tools
Base64 Converter Encode/decode Base64 for text, images, and files in your browser. Includes Data URI generation and Base64-to-file download. File tab supports up to 10MB. Regex Tester Test and validate regular expressions with real-time matching, syntax highlighting, and common patterns library. Free online regex tester for developers. Text Diff Comparison Free online compare two texts and highlight differences. Side-by-side comparison with line-by-line and character-level diff visualization.
photo
Batch Image Watermark Free online add text or logo watermarks to multiple images locally in your browser. Position, size, opacity, and tiling. Works offline. Passport Photo Maker & Layout Free online create passport/ID photos with crop guides, simple background cleanup, and printable A4 layout. Works offline.
Text Tools
Batch String Operations Apply transformations to lists of lines: trim, case, replace (regex), add prefix/suffix, sort, dedupe, filter, numbering. Text Statistics Free online text analysis tool - count words, characters, sentences, paragraphs. Get detailed statistics including reading time, keyword density.
events
Statistics
Binomial Distribution Free online Binomial Distribution Calculator. Compute Probability Mass Function (PMF), Cumulative Distribution Function (CDF), and quantiles. Normal Distribution Compute Normal distribution PDF, CDF and inverse CDF (quantile). Plot curve and sample values — local-first, easy and free.
health
BMI Calculator Free online BMI Calculator. Calculate your Body Mass Index instantly to assess your weight status. Get personalized calorie recommendations. Private and secure. Body Health Calculator Calculate and understand BMI, BMR, body fat percentage, waist-to-hip ratio, and other body composition metrics with detailed explanations —. Lung Nodule Risk Guide (Educational) Free online estimate qualitative risk and view guideline-based follow-up for incidental pulmonary nodules. Private, offline, multilingual. Not medical advice.
Health
Breathing Exercise Simple guided breathing exercises for relaxation and stress relief. Follow the visual guide to breathe in, hold, and breathe out.
science
Buffer Preparation Calculator Free online Buffer Preparation Calculator. Design chemical buffers using the Henderson–Hasselbalch equation. Estimate component masses. Works offline.
Games
Click Speed Test (CPS) Test how fast you can click in 5, 10, or 30 seconds. Challenge your friends and check your CPS (Clicks Per Second). Track your history and improve your speed.
Design Tools
Color Toolbox Complete color toolkit - HEX/RGB/HSL converter, color palette generator, contrast checker, and color blindness simulator. Easy and free online color tools.
Math Tools
Common Math Functions Free online Common Math Functions calculator. Compute factorials, permutations (nPr), combinations (nCr), GCD, LCM, and perform prime number tests.
calculator
Compound Interest Calculator Free online Compound Interest Calculator. Calculate the future value of your investments and savings with daily, monthly, or yearly compounding. Grade Statistics Analyzer Analyze class grades: calculate average, distribution, pass rates, and generate statistical reports. Free online grading tool for teachers and educators. Renovation Calculator Free online Renovation Calculator for home improvement projects. Accurately estimate materials needed for tiles, paint, flooring, and wallpaper.
Utility Tools
Countdown Timer Free online countdown timer with customizable alerts, sound notifications, and multiple presets. Perfect for cooking, workouts, meetings, and productivity. QR Code Decoder Free online QR code decoder and scanner - decode QR codes from images, camera, or drag and drop. Extract text, URLs, WiFi passwords, contact info from any QR code instantly. Random Picker Free online random picker and lottery wheel. Make decisions easy with random selection, spin wheel, and lucky draw. Perfect for giveaways and games. Unit Converter Free online convert between different units of measurement including length, weight, temperature, volume, area, speed, and more. World Clock Free online world clock tool - check current time in multiple timezones. Add favorite cities, compare different time zones.
Security
Crypto Tool Free encryption and decryption tool - Encrypt and decrypt text and files using AES encryption. Secure and easy to use online.
office
CSV ↔ XLSX Converter Convert CSV to Excel (XLSX) and vice versa instantly in your browser. No upload, 100% local processing preserves your data privacy. LaTeX Formula Editor Type LaTeX mathematical formulas and render them instantly in high quality. Export to PNG, copy to clipboard, works offline. Simple DOCX Editor Open and edit DOCX Word files directly in browser without Microsoft Office. Modify text content, adjust formatting, export edited document. Simple Table Editor Open Excel (XLSX) sheets, edit cells, insert or delete rows and columns, run instant search, view column stats, and export to XLSX or CSV —.
lifestyle
Days Alive Calculator Calculate exactly how many days, hours, minutes, and seconds you've been alive. Fun life statistics calculator with milestone tracking and interesting facts. Infant Growth Chart Percentiles Free online track height and weight over time and estimate percentiles (approximate). Private, offline, and printable chart.
Science Tools
Dilution & Molarity Calculator Free online Dilution and Molarity Calculator. Perform M1V1=M2V2 dilution calculations, determine molarity from mass, and calculate percent solutions.
math
Distribution Suite One place for Normal, t, F, Chi-square, Poisson — PDF/PMF, CDF, quantiles and sampling with interactive plots. Local-first, easy and free.
Image Tools
Emoji to Image Convert emojis to images (PNG/JPEG/WEBP/SVG). Batch export, transparent background, works fully offline — easy and free online tool. Favicon Generator Free online Favicon Generator. Convert your images and SVG files into professional favicon formats (ICO, PNG) for your website. GIF Converter Convert images to animated GIF or extract frames from GIF animations. Adjust frame delay, quality, size and loop settings. HEIC to JPG/PNG Free online HEIC to JPG/PNG converter. Convert iPhone HEIC photos locally in your browser with optional quality and size settings. No uploads, fully private. Image Compressor Free online image compressor - reduce file size of JPEG, PNG, WebP images while maintaining quality. Easy drag-and-drop interface, batch compression support.
Photography
EXIF/GPS Cleaner View, analyze and completely remove EXIF metadata, GPS location data from photos. Protects your privacy before sharing images online.
Productivity
Gantt Planner Create simple Gantt charts: add tasks with dates and colors, drag to reorder, and export as PNG/SVG. Free, local, offline-ready. ICS Calendar Toolbox Merge multiple ICS calendar files, filter events by date range, convert formats and manage calendar data. Privacy-first calendar tool that works offline.
Media
Image Editor Edit images online with professional tools: resize, rotate, crop, apply filters and effects. Works 100% locally in browser, no upload required.
music
Instrument Tuner (Microphone) Free online Instrument Tuner. Accurately tune your guitar, ukulele, violin, or any other instrument using your microphone. Online Metronome & Tap BPM Precise online Metronome and Tap BPM tool. Features visual pulse, adjustable subdivisions, accents, and tap tempo function. Perfect for music practice.
Data
JSON Parser Free online JSON Parser and Formatter. Parse, validate, format, and minify JSON data instantly. Features syntax highlighting, error detection, and tree view.
Education
LaTeX Formula Renderer Free online LaTeX Formula Renderer. Convert LaTeX math equations to high-quality PNG or SVG images instantly. Uses KaTeX for fast rendering.
Reference
macOS Shortcuts Free online quick reference for common macOS keyboard shortcuts including screenshots, window management, and system controls.
games
Memory Match Play Memory Match online for free. Flip cards to find matching pairs in this classic puzzle game. Features timed and move-limited modes, combo scoring.
Text
Morse Code Translator Translate text to Morse code and decode Morse code to text instantly. Includes audio playback with adjustable speed. Free online tool for learning and practice.
finance
Mortgage Calculator Calculate monthly mortgage payments, total interest, and amortization schedule. Compare loan scenarios and plan your finances. Easy and free online calculator.
Lifestyle
Omikuji: Japanese Fortune Draw a Japanese Omikuji fortune (Daikichi to Daikyo) with authentic traditional weights. Shareable result with beautiful animations — local, easy and free.
PDF Tools
PDF Converter Free online PDF converter - convert PDF to Word (DOCX), Excel (XLSX), PowerPoint (PPTX), images (PNG, JPG, WebP), HTML, and text. Also convert images to PDF. Easy to use, no registration required.
utility
QR Code Generator & Scanner Free online generate, scan, and customize QR codes with various data types including text, URLs, WiFi, contacts, and more.
Video Tools
Subtitle Timeline Editor Free online SRT/WebVTT subtitle editor with video preview. Shift, stretch, split/merge, validate, and export — all offline in your browser.
Entertainment
Tarot Reading Free online tarot card reading - discover your future with authentic tarot cards. Multiple spreads including single card, three-card, and Celtic cross. Zodiac Fortune Free online zodiac fortune teller - check daily horoscopes, personality traits, compatibility, and fortune predictions for all 12 zodiac signs.
Logistics
Volumetric Weight & Packing Free online Volumetric Weight Calculator and Packing Planner. Calculate dimensional weight for DHL, UPS, FedEx. Estimate box packing capacity. Works offline.