Useful Free Online Tools and Sites
List of some useful free online tools and sites
Feel free to send a PR to add more tools or sites (pay attention to order the content alphabetically please. The tools and sites have to be free)
3D, VR and IRLAgileAIAPIsAudio, Music & SoundsBarcodesBitcoinsCalculators & ConvertersCloud ComputingColorsCronDataDiagrams & DesignDocumentsEmailExcelFontsGPSIcons & LogosImages and GraphicsJSONJobsKnowledgeMiscelaneaMusical ProductionNetworkOS (Operating System)Photography & PhotographersProductivityProgrammer UtilitiesProgramming LanguagesRetroSearchSecuritySharingShopping Prices & StoresSlidesSocial NetworksStatusStrings and TextsTechnologyTimeUser ProfileVideosWeatherWebWebcams
3D, VR and IRL
Agile
AI
- AI Painter - (See your photo turned into artwork in seconds!)
- Bored Humans - (Teaches you how to create new art like a real painter would)
- ChatGPT - (Optimizing Language Models for Dialogue)
- Dream - (Write terms and draw)
- GauGAN2 - (Creates realistic scenarios quickly)
- Generated Photos - (Photos generated completely by IA) . some samples here
- Generated Photos Anonymizer - (Protect your identity with generative media)
- Google AutoDraw - (Fast drawing for everyone)
APIs
- Any API - (Over 1400 Public APIs)
- API Directory - (Search the Largest API Directory on the Web)
- Postman Web - (Postman Web)
- REQBIN - (Online REST & SOAP API Testing Tool)
Audio, Music and Sounds
- Audio Converter - (Convert audio files to MP3, WAV, OGG)
- Audio Converter Online - (Supports MP3, WAV, M4A, FLAC, OGG, AAC, M4R, WMA, OPUS, AIFF and MMF formats)
- BandLab Mix Editor - (Bandlab Audio/Midi Editor Online)
- BandLab Song Starter - (Bandlab Song Starter for musicians inspiration)
- BBC Sound Effects - (Search BBC Sound Effects - Buy sound button to use a sound commercially)
- Bensound - (Here you will find some royalty free music)
- BPM Calculator - (Useful for musicians, for dancers, or whoever wants to know the BPM of a song, a sample, or a backing track)
- Frequency to Pitch Calculator - (To calculate the frequency of a note in reference)
- Free Online Metronome - (Online Metronome)
- Free Sound - (Collaborative database of Creative Commons Licensed sounds)
- LALALAI - (Extract vocal, accompaniment and various instruments from any audio)
- Loudness Penalty - (Find out if your music will be turned down by YouTube, Spotify, TIDAL, Apple Sound Check and more)
- Microphone Test - (Check it works properly and find out useful details about it)
- MIDI CC List for Continuous Controllers - (Use this list to set up your MIDI controller and manipulate your MIDI data)
- Mixkit - (Incredible Free Sound Effects)
- Mp3Cut - (Audio Cutter)
- Online Metronome - (Online metronome to stay in time!)
- Overtones & Harmonics Calculator - (The calculator shows you the even, and the odd harmonics of your fundamental frequency)
- Piano Chord Chart - (Show all chords selecting the root of the chord)
- Pixabay Sound Effect - (Royalty free sound effects)
- Pre-Delay & Reverb Time Calculator - (Find the right time settings for your pre-delay and reverb)
- Song Key finder - (Find In What Key A Song Was Composed With Our Online Music Key Analyzer)
- Streaming Royalties Calculator - (Find out what most common music streaming platforms are likely to pay you per stream)
- Sound Wave Maker - (Create sound waves based on your music of choice)
- SoundBible - (Free sound clips for download in either wav or mp3 format)
- Text to Speech - (Text to mp3 or wav)
- Tone/Transfer - (Mix and match music and machine learning to unlock new sounds)
- These Lyrics Do Not Exist - (Lyrics generated using Artificial Intelligence)
- Uberduck - (Synthetic speech toy to emulate voices)
- Wav2Png - (Audio to Image Converter and viceversa)
Barcodes
- EAN 8 - (Generates EAN8 Barcode)
- EAN 13 - (Generates EAN13 Barcode)
- EAN 14 - (Generates EAN14 Barcode)
- UPC-A - (Generates UPC-A Barcode)
- UPC-E - (Generates UPC-E Barcode)
Bitcoins
Calculators & Converters
- Acceleration Converter - (Convert between Acceleration units)
- Angle Converter - (Convert between Angle units)
- Area Converter - (Convert between Area units)
- Convert to PDF - (Converts text files to PDF)
- Currency Converter - (Convert between Currency units)
- Data Size Converter - (Convert between Data size units)
- Easy Calculation - (Free Calculators and Converters)
- Energy Converter - (Convert between Energy units)
- File Converter - (Supports nearly all audio, video, document, ebook, archive, image, spreadsheet, and presentation formats)
- Force Converter - (Convert between Force units)
- Length Converter - (Convert between Length units)
- Power Converter - (Convert between Power units)
- Pressure Converter - (Convert between Pressure units)
- Speed Converter - (Convert between Speed units)
- Time Converter - (Convert between Time units)
- Torque Converter - (Convert between Torque units)
- Unit Converter - (Converts a value from a unit to another)
- Volume Converter - (Convert between Volume units)
- Weight Converter - (Convert between Weight units)
Cloud Computing
- Azure Services - (Useful list of all the Azure Services)
- CNCF Cloud Native Interactive Landscape - (Trail Map)
- CNCF Cloud Native Interactive Card Mode - (Card Mode)
- CNCF Cloud Native Interactive Members - (Members)
- CNCF Cloud Native Interactive Serverless - (Serverless)
Colors
- Adoble Color Wheel - (Adobe Color Wheel to get the correct colors)
- Color Converter - (Color Converter)
- Color Constrast Analyzer - (Color Contrast Analyzer between foreground and background)
- Color Hunt - (Color Palettes for Designers and Artist)
- Color Mixer - (Color Mixer btween two colors)
- Color Palette from Image - (Generate a Color Palette from an Image)
- Color Picker - (Pick a color from the palette and get the color code in HEX, RGB, and HSL)
- Color Picker - (Color Picker to get the HEX, RGB, HSL, Lighter and Darker color)
- Colordot - (A color picker for humans)
- ColorKit Color Palettes - (Color Palette Inspiration)
- Colors CMYK - (CMYK Calculator)
- Gradient Maker - (Create a Gradient Online and Copy CSS or Download PNG)
- HTML Colors - (HTML Color Chart)
Cron
- Cron Expression Descriptor - (Describes Cron expressions as human readable text)
- Cron Schedule Tool - (Quick and simple editor for cron schedule expressions)
- NContrab Expression Tester - (crontab parsing, formatting and DateTime calculation)
Data
- Data Comparer - (Compare your data and find differences between them)
- DeDupeList - (Remove duplicate lines from a list)
- Remove Duplicate - (Online tool to remove duplicate lines)
Diagrams & Design
- C4 Model - (For Visualising Software Architecture)
- Drawio - (Flowchart Maker & Online Diagram Software)
- Vectr - (Free Vector Grpahics Software)
- Visme - (Visual brand experiences)
Documents
- Adobe Compress PDF - (Drag and drop a PDF to reduce its file size fast)
- Convertio - (Converts EPUB to PDF)
- I love PDF - (Reduce file size while optimizing for maximal PDF quality)
- Issuu Downloader - (Download the documents that you can find at Issuu)
- Issuu Downloader - New - (Download the documents that you can find at Issuu)
- Small PDF - (Reduce the size of your PDF online)
- Correo Temporal - (Create a temporal email account during less than one year)
- Guerrilla Mail - (Temporary Email)
- TempMail - (Create a temporary email address)
Excel
Fonts
GPS
- Epsg.io - (Coordinate Systems Worldwide)
- GPS Coordinates - (Tool used to find the latitude and longitude of your current location)
- LatLong.net - (Latitude and Longitude Finder)
Icons & Logos
- flatIcon - (5.7M vector icons & stickers)
- freepik - (graphic resources for all)
- iconApe - (500K vector Logo, Icons!)
- IconFinder - (Big library of free icons (with some payment icons too))
- Icons8 - (Free icons, illustrations, photos, music, and design tools)
- Iconshock - (Free icons)
- Noun Project - (Icons and Photos for Everything)
- Seek Logo - (300.000+ Vector Logos in AI, EPS, CDR, SVG, PDF)
- Share Icon - (Donwload Free Icons in PNG, SVG,...)
- SVG Repo - (300.000+ SVG Vector and Icons)
- World Vector Logo - (Brand logos in SVG format)
Images and Graphics
- Base64 Image Encoder & Decoder - (Encode an image to Base64, or decode Base64 to an image)
- Base64 Images - (Convert to Images to Base64)
- Dummy Image Generator - (Quickly and easily create placeholder images)
- HEICtoJPEG - (Convert HEIC photos to JPEGs)
- Image Generator - (Create images of any size)
- Image to Base64 - (Convert image to Base64)
- NightCafé - (Create Something Amazing)
- Pexels - (Free Stock Photos, Royalty Free Images and Videos Shared by creators)
- Photopea - (Advanced Image Editor Online)
- Placeholder image generator - (Create dummy images online)
- PNG to ICO Converter - (Convert PNG to ICO online, for free)
- Remove Background - (Remove the background of an image)
- SVG to PNG - (SVG to PNG converter)
- The Spriters Resource - (Collection, archival, and appreciation of materials from video games)
JSON
- JSON Diff - (The semantic JSON compare tool)
- JSON Editor - (Online editor for JSON files)
- JSON Editor Online - (Online editor for JSON files)
- JSON to C# - (Convert JSON to C# Classes Online)
- JSON Validator - (Validates a JSON file)
- JWT Decoder - (Decode a JSON Web Token to view the claims inside)
Jobs
Knowledge
Miscelanea
- Avion Safety Network - (Database of aerial accidents since 1930)
- Dictation - (Speech recognition to write emails and documents in Google Chrome)
- Fake Credit Card - (Valid Credit Card Numbers with complete details for Data Testing)
- Nuclear Blast Simulator - (Experience the power of a nuclear blast in your area)
- This Person Not Exist - (Creates an image of a person that not exist)
- Paper Sizes - (Calculates between Size, PPI/DPI and Width/Height)
- QR Code Generator - (Create Your QR Code for free)
- QR Code Generator - (Generates a QR code image from words or text)
- QR Code Reader - (Read the text data from a QR code image)
- QRCode.show - (Generate QR code easily for free)
Musical Production
- Audio Cutter - (Trim and cut audio tracks)
- Audio Joiner - (Join multiple audio tracks into one)
- Audiomack - (Is aFree limitless music sharing and discovery platform for artists, tastemakers, labels, and fans)
- Bandcamp - (Discover amazing new music and directly support the artists who make it)
- Bandzoogle - (Build a stunning band website and store in minutes)
- CD Baby - (Has partnered with over 150 streaming services and music retailers worldwide)
- Distrokid - (Get 7% off using this link - Digital music distribution service)
- ER-99 Drum Synth - (Web-based instrument based on a famous Japanese drum machine from the 1980s)
- Pitch Changer - (Change audio pitch without affecting the tempo)
- Song Key Finder - (Analyzes music and finds musical key, bpm and ms)
- SoundCloud - (Lets people discover and enjoy the greatest selection of music from the most diverse creator community on earth)
- Tempo Changer - (Speed up or slow down audio playback without affecting the pitch)
- Vocal Remover - (Separate voice from music out of a song free with powerful AI algorithms)
- Voice Recorder - (Record your voice and add Reverb and EQ before download it)
Network
- Fast - (Test the speed and performance of your internet connection)
- IP Lookup - (Look up for the geolocation of a given IP address. Supports both IPv4 and IPv6)
- IP Number Converter - (Converts between IP addresses and numbers supporting both IPv4 and IPv6)
- My IP - (Check your current public IP address and look up for the info regarding the geolocation of your IP)
- Speed Test - (Test the speed and performance of your internet connection)
- SSL Server Test - (Deep analysis of the configuration of any SSL web server on the public Internet)
- What is my IP Address? - (Your IP information)
- WHOIS Lookup - (Look up for the ownership and registration info of a given domain name as known as WHOIS data)
OS (Operating System)
Photography & Photographers
- EXIF Viewer - (View the EXIF metadata of an image file if exists)
- Moon Phases (2021) - (Dates and hours of all Moon Phases in 2021)
- Moon Phases (2022) - (Dates and hours of all Moon Phases in 2021)
- Photography Calculator - (Online tools for photographers)
Productivity
Programmer Utilities
- .NET Development Tools - (GUID Generator, Hash Generator & Machine Key Generator)
- ASCII, Hex, Binary, Decimal, Base64 Converter - (Multiple converter at the same time)
- Ascii to Binary Converter - (Ascii text to binary converter tool)
- Ascii to Decimal Converter - (Ascii text to decimal converter tool)
- Ascii to Hexadecimal Converter - (Ascii text to hexadecimal converter tool)
- Base64 Encoder & Decorder - (Converts text to Base64 or decode Base64 to text. Supports UTF-8)
- Binary to Ascii Text Converter - (Binary to ascii text converter tool)
- Binary to Decimal Converter - (Binary to decimal converter tool)
- Binary to Hexadecimal Converter - (Binary to hex conversion tool)
- Binary to Octal Converter - (Binary to octal conversion tool)
- Case Converter - (Converts text to lowercase, UPPERCASE, camelCase, PascalCase, snake_case, and more)
- Case Converter - (Convert your text to different cases [UPPERCASE, lowercase, camelCase, PascalCase, snake_case, kebab-case...])
- Code Beautify - (Converts between different formats, supporting a wide variety)
- Code Syntax - (Converts your code snippets into pretty-printed HTML format)
- Code Syntax Highlighting - (Converts your code into HTML format supporting a lot of programming languages)
- Code To Image - (Create screenshots of code or text to share on social media)
- Data Generator - (Create any data sets you need [JSON, XML, CSV, YAML, SQL])
- Decimal to Binary Converter - (Decimal to binary converter tool)
- Decimal to Hexadecimal Converter - (Decimal to hex converter tool)
- Decimal to Octal Converter - (Decimal to octal converter)
- Diff Checker - (Compares to find the differences between two texts)
- Extract URLs from Text - (Extracts links and URLs from a text string online)
- GUID generator and GUID validator - (Random GUID generator)
- Hash Generator - (Tool to generate a hash value of a string supporting a lot of algorithms)
- Hex to Decimal Converter - (Converts Hexadecimal to Binary)
- Hexadecimal to Ascii Text Converter - (Hex to string converter)
- Hexadecimal to Binary Converter - (Hex to binary converter tool)
- Hexadecimal to Decimal Converter - (Hex to decimal converter tool)
- Invert Text Case - (Invert Text Case Online)
- Lorem Flickr - (Generates Lorem Ipsum photos with Creative Commons license)
- Lorem Ipsum Generator - (Generates Lorem Ipsum in paragraphs)
- Lorem Picsum - (Generates Lorem Ipsum photos)
- Markdown Tables generator - (Copy/Paste a table to convert it to Markdown)
- MockApi - (The easiest way to mock REST APIs!)
- Music for Programming - (Music to hear when we are programming)
- ngrok - (Programmable network edge that adds connectivity, security, and observability to your apps with no code changes)
- Octal to Binary Converter - (Octal to binary converter tool)
- Octal to Decimal Converter - (Octal to decimal converter tool)
- Password Generator - (Generates a password with multiple options)
- Regular Expression Tester - (Tester for Regular Expressions)
- Remove All Except Numbers - (Remove All Except Numbers Online)
- Remove Digits - (Remove All Digits From Text)
- Remove Multiple Spaces - (Remove Multiple Spaces Online Tool)
- Slug Generator - (Coverts a URL into a URL slug)
- Slugify Text - (Slugify Text Tool)
- Telerik Code Converter - (Converts between from/to C# & VB.NET)
- Text Capitalize - (Text Capitalizer Online)
- Text Editor - (Write text in this online editor with your prefer syntax)
- Text to camelCase - (Text to camelCase Online Converter)
- Text to kebab-case - (Text to kebab-case (dash-case) Online Converter)
- Text to Lower Case - (Text to Lower Case Online Converter)
- Text to snake_case - (Text to Snake Case Online Converter)
- Text to Title Case - (Text to Title Case Online Converter)
- Text to Upper case - (Text to Uppercase Online Converter)
- Text to Sentence case - (Sentence Case Converter Online)
- UNIX Timestamp Converter - (Converts between Epoch/UNIX timestamps and datetimes)
- URL Parser & Query String Splitter - (Pase a URL into smaller components)
- YAML Validator - (Validates a YAML file)
Programming Languages
- .NET Fiddle (C#, VB.NET and F#) - (Online Compiler to run and share your code online)
- C Script - (Shell script to compile and execute C "scripts" in one go)
- CodePen - (Social development environment for front-end designers and developers)
- DartPad - (Free, open-source online editor to help developers learn about Dart and Flutter)
- dpaste.org - (Share your snippets code in different programming languages)
- HexEd.It - (Hexadecimal Editor)
- HTML5 Editor (HTML) - (Bidirectional editor for HTML web pages)
- MDB - (Snippets for Bootstrap)
- Online C# Compiler - (Online compiler for C#, but you will find other programming languages)
- replit - (Online Editor & Compiler for Python, Node.js, C, Java, C++, Ruby, Go, Rust, C#, F#, R, Elixir, Dart, and more)
- SharpLab (C#) - (Online Editor & Compiler for C#)
- StackEdit - (In-Browser Markdown Editor)
- The Go Playground (Go) - (Online Editor & Compiler for Go)
Retro
Search
- Biblioteca Universidad Complutense - (Spanish - Search books, articles and other documents of this University Library)
- Internet Archive - (Search web, books, video, audio, software and images)
- Scholar Google - (Search academic information)
Security
- SHA 256 Algorithm - (Text, Bin, Hex - Sha256 Algorithm Explained)
- SRI Hash Generator - (Subresource Integrity for Web Developers)
Sharing
- Imgbb - (Upload & Share your images)
- MyAirBridge - (Allows the use of end-to-end encryption with a secure data transmission)
- WeTransfer - (Transfer files and share them with other users)
Shopping, Prices & Stores
Slides
Social Networks
- EmojiTerra - (Emojis to copy and paste)
- Fancy Text Decorator - (Generate cool text to be used on Whatsapp, Instagram, Twitter, Youtube, Discord...)
- Free YouTube Downloader Online - (Download the YouTube content easily)
- Full Emoji List - (Emoji List)
- Giphy - (GIFs & Stickers)
- Instagram Downloader - (Download Photos, Videos, IGTV & carousel)
- LinkedIn Video Downloader - (Best Free online Video Downloader for Social Media Videos)
- Meme Generator - (Meme Generator)
- OFFEO - (YouTube Downloader)
- TweetDeck - (Twitter Web Client)
- Twitter Symbols - (Add symbols easily to your Twitter messages)
- Twitter Video Downloader - (Download Twitter Videos to Mp4 & Mp3)
- Twitter Downloader - (Download Twitter Videos and Gifs)
- Vidiget Downloader - (Donwload a youtube video, instagram post, facebook post or twitter post)
- Vidiget YouTube Downloader - (Download Youtube videos)
- YouTube Downloader - (Download Youtube to mp4 & mp3)
- YouTube Downloader - (Convert and download Youtube videos in MP3, MP4, 3GP for free)
Status
- AWS Status - (Amazon Web Service Status)
- Azure Status - (Microsoft Azure Status)
- Azure DevOps Status - (Status of the Azure DevOps Services)
- Downdetector - (Real-time problem & outage monitoring)
- Fastly - (Service Status)
- GitHub Status - (GitHub Status)
- Xbox Status - (Microsoft Xbox Status - En-us)
Strings and Texts
- Characters and Symbols - (Standard ASCII set, HTML Entity names, ISO 10646, ISO 8879, ISO 8859-1 Latin alphabet No. 1)
- Random text generator - (Create dummy text for all your layout needs)
- String Utilities - (Counts the characters, words, lines, reverts the text, and converts text to lowercase or UPPERCASE)
Technology
Time
- Greenwich Mean Time - (Check current time anywhere)
- The World Clock - (Find current time, weather, sun, moon, and mucho more...)
- WorldTimerServer - (Current Time in UTC/GMT)
User Profile
Videos
- Clideo - (Video tools)
- Extract Audio From Video - (Extract and download the audio from a video, or remove the audio from a video)
- MOV to MP4 Converter - (Convert MOV to MP4 online, for free)
- Trim Video - (Trim or cut video of any format)
- UnScreen - (Remove Video Background [only for videos of 5 seconds])
Weather
- SunriseSunset.io - (The tool to find sunrise and sunset times in your city)
- Windy - (Weather forecast visualization [for bikers, drones, fishermen, photographers,...])
Web
- Cached View - (The Google Cache Browser for any page on Internet)
- Cached Views - (Cached view of any page on Internet through multiple cached sources)
- Backlink Discovery Tool - (Analyze the backlinks behind your competitors’ rankings)
- Google PageSpeed Insights - (Improve the speed of your web pages on all devices)
- ScaffoldHub - (The javascript/typescript full-stack web application generator)
- WayBackMachine - (Internet Screenshots - Web Pages Saved)
Webcams
Contributors
Thanks to: