Unknown Index
The directory of unknown websites, tools, utilities, and archives most people never discover.
Surprise me →Library of Babel
Hidden WebsitesA website inspired by the Borges story that contains every possible page of 3,200 characters, which you can search to find any text you can think of.
libraryofbabel.info
Low-tech Magazine
Hidden WebsitesA magazine about the past and the future of low-technology solutions, run on a website that is itself powered by solar energy.
solar.lowtechmagazine.com
VisuAlgo
Learning ResourcesAnimated, step-by-step visualisations of data structures and algorithms, from sorting and linked lists to graphs and dynamic programming, with the ability to run each on your own input.
visualgo.net
Recently Added
The latest discoveries added to the index
SonicMeet
Productivity ToolsReal-time bilingual captions and accurate translation for Google Meet, Zoom, and Microsoft Teams. Take notes, save transcripts, and stay present in every meeting.
sonicmeet.app
Photo Text Editor
Creative ToolsPhoto text editor for replacing words in pictures. Use free manual tools in your browser, or try AI and inspect the watermarked preview.
phototexteditor.org
Neatbo
Productivity ToolsUse 345 free online tools to compress images, merge PDFs, convert TXT to EPUB, clean CSV and JSON, and calculate subnets. Process files locally without an account.
neatbo.com
HackerTube AI
ArchivesDiscover 6,454 videos from HackerTube’s public archive. Search 150 topics, explore programming and AI talks, watch YouTube videos, and save your next find.
hacker-tube.com
Framov Video Frame Extractor
Productivity ToolsExtract frames from video in your browser with Video to Frames. Save PNG and HD stills, download a ZIP, load a public video URL, and move selected frames into Photoshop.
framov.com/video-frame-extractor
Invisible Character
Productivity ToolsCopy invisible characters, blank text and invisible spaces instantly. Free, no sign-up.
invisiblecharacter.io
Collections
Themed lists of hidden tools worth discovering
7 Useful Websites Most People Have Never Heard Of
7 sitesThe internet is enormous. Most people only ever see the same handful of sites. These seven are worth knowing about.
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5 Free Developer Tools for API Testing and Debugging
5 sitesThese tools are free, powerful, and criminally underused. If you write code, build APIs, or work with data — bookmark these.
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5 Best Free AI Research Tools for Finding Information Faster
5 sitesNot hype. Not chatbots. These AI tools solve real research and data problems that generic tools cannot handle.
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