The following post includes online development tools for productivity frequently. You may want to check REST API page further online tools providing API to retrieve specific data.
Productivity & Devs
Crontab.guru - The cron schedule expression generator helps me to validate crontab scheduling format.
Cron Visualizer allows visualization of cron jobs in graphical representation. Vertical axis represents days, horizontal axis represents time.
Link Shortener free An open source link shortener.
DownGit Copy the link of a GitHub folder inside a specific repo and download the specific folder. It helps you to avoid downloading entire project folder.
Git Diagram Scans the provided Github repository and generates block diagram.
Linters
JSON Editor - Validator
JsonCrack JSON visualizer
CSS
Tailwind CSS Full Tailwind component examples.
Tailframes - Tailwind CSS UI Kit
FlexboxLabs it’s a visual tool that helps you create layouts using CSS Flexbox.
UIVerse Open-Source UI elements made with CSS or Tailwind.
daisyUI — Tailwind CSS Components Components compatible with Tailwind.
Web Development
10015 Tools All Online Tools in One Box
Algorithms & Graphics Programming
Graphtoy Visualize signed distance functions.
3D Rotation Converter Matrix Operations
CineShader CineShader is a realtime 3D shader visualiser. It leverages the Shadertoy.com API to bring thousands of existing shader artworks into a cinematic 3D environment.
Data Visualization
Information is Beautiful This is not an app rather an inspiration source about data visualization.
LiveGap Online Chart & Graph Maker. Provides creating and exporting animated videos of the graphs.
Design
⭐️ Discover Best Web Design Tools in The Internet
Colour Contrast Checker Check the contrast between different color combinations against WCAG standards.
Mixkit Awesome free assets for your next video project.
Items.Design Quality Design Assets For Free including only images and app icon like files.
Lummi — Free AI Stock Images, Illustrations & 3D
Grainient Gradient backgrounds.
framer.com - website builder
Supahero Website hero section library.
Shots Create Amazing Mockups. Apple focused mockups like, desktop, iPhone and browser.
Mockuply Paid mockups. Can be used as inspiration.
Mockup take image, choose bg for social media, or devices…
Mockup Creator Takes screenshot and apply mockup for social media, code block, browser window, etc…
ContentCore 3D mockups, free tier.
photogradient Create gradients online
Code Timeline Generates timeline like graphics for pasted code. Interesting and might be useful for visualizations.
Fonts
Developer Fonts Preview lots of mono-spaced fonts for code editors.
UNCUT.wtf Free stylish modern fonts.
Open Foundry Fonts
FontJoy Determine Font Pairs, Typography
Huge List of Unicode Character Symbols
Apps
Photopea Online Photo Editor similar to Photoshop.
3D
Tinkercad Online editor for 3D printing.
File Sharing
Send large files up to 5GB for free A file sharing system alternative to wetransfer.
DIY
Repair Clinic Your One-Stop DIY & PRO Resource for home appliances.
Sound
Movie Music Quiz, blind test movie music, movie and TV news Listen to the music try to guess which movie it is. game creativecoding
A Soft Murmur Online geophonic soundscape generator according to specific audio tracks.
Image
Lorem Picsum The Lorem Ipsum for photos.
Pexels The best free stock photos, royalty free images & videos shared by creators.
Video
YoutubeDL Online youtube video downloader app.
FFmpeg Online Free Online Video Processing Tool with AI
Misc
Türkiye’nin Antik Kentleri Showing locations of antique cities in Türkiye.
A Good Movie To Watch What To Watch On Streaming Platforms. It suggests movies.
Tunefind Music from TV Shows & Movies.
Wiby Search Engine for the Classic Web. Check “Surprise me” hyperlink to view interesting web sites.
roadmap.sh roadmap.sh is a community effort to create roadmaps, guides and other educational content to help guide developers in picking up a path and guide their learnings.
Writing & Reading
TinyWow Free AI Writing, PDF, Image, and other Online Tools.
DeftPDF Free PDF Software to Edit, Convert, Sign & More.
Online PDF Converter Fast, easy to use & free!
Fake Data Modern version of Lorem Ipsum generator.