A new way to diff websites

In plain words

Diffd is a tool for comparing websites and detecting changes between versions. Launched in 2015, it allows users to see visual differences between two web pages side by side, making it useful for developers, designers, and anyone who needs to track website modifications. The service helps identify what has changed between snapshots of a site, whether for quality assurance, monitoring competitor sites, or documenting updates over time.

written from the facts on this page · September 2026

• DI
  Diff.io2015 · diff.io · ▲194
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  Diff2019 · getdiff.app · ▲90

  Prototype and share changes to your site with no coding

• 
  PDF-Diff - Visualize any differences between two PDFs2022 · github.com · ▲169

  A tool for visualizing differences between two pdf files. - serhack/pdf-diff

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  Diffchecker 2.02020 · diffchecker.com · ▲153

  Check the differences between two text files, images or PDFs

• 
  API Diff2022 · api-diff.io · ▲161

  Diff two API versions in seconds and see what has changed

• 
  Diffshop2024 · ▲108

  #1 Product Research, Trend Discovery and Adspy Tool

• 
  SimCity, but with Permits▲887

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 24h ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

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  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

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  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• 
  Brain.fm▲957

  Music for the brain to improve focus, meditation & sleep

  AI · 2015 · brain.fm

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  Something pointless I made▲747

  Life & fun · 2015 · dn.ht

• PA
  Parinfer – a simpler way to write Lisp▲674

  Parinfer - simpler Lisp editing

  Life & fun · 2015 · shaunlebron.github.io

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  Motion AI▲634

  Easily build chatbots to do anything, on any platform!

  AI · 2015 · motion.ai

• 
  f.lux for iOS▲596

  Auto adjust your iOS display based on the time of day

  Dev tools · 2015 · justgetflux.com

• 
  Fieldbook▲592

  Create a database, as easily as a spreadsheet

  Dev tools · 2015 · fieldbook.com