a.k.a. "slimwebware". Several websites I use as quick tools. Please mention any other you know.
- whatismyip.fr — know thy IP
- iplocation.net — where on Earth is that IP?
- magic-net.info/index.dnslookup — network analysis
- canyouseeme.org — port scan
- youhavedownloaded.com — public logs of your illegal downloads
- onlinemd5.com — upload, checksum and compare (md5, sha1, sha256)
- virustotal.com — checks a file with multiple antiviruses. Fast (hash) or complete
- base64online.com — decodes base64
- ismyblogworking.com — web auditing
- websiteoptimization.com — web auditing
- workwithcolor.com/hsl-color-picker-01.htm — color wheel, hsla compatible
- wordcounttool.com — counts words
- managewp.com — excellent for WordPress webmasters
- pagespeed.googlelabs.com — speed validator. I’m happy with a web agency if everything’s green here
- webpagetest.org — and here too.
- validator.w3.org — HTML validator. I need one that scan the whole site
- border-radius.com. Generate
- HSL Color Picker. Works with HSLa, convert… excellent color picker.
- CSS validator — a little bird tells me this one will be hard to satisfy.
- Human time to Unix time (and back) — Convert human-readable date to something like 1322442060 (seconds since 1970-01-01)
- caniuse.com — browser support
- rot13.com — encodes/decodes rot13
- profilewatch.org — check your Facebook privacy
- SaveVideo.me — supports more websites than saveyoutube.
- PDFfcompress/ — up to 5 Mb, it's free.
- J’aime attendre — queue lines IRL (France only)
- Online stopwatch — keeps "ringing" (rooster), so good fire-and-forget
- Audiotag — identify mp3 and others by uploading
- Cueprompter — great for presentation. Works on local cache only too
- ean-search.org — find a product by its European identifier (EAN).
- regexe.com — test your regexp.
- Codecog equation editor — LaTeX pictures creator
- smallpdf.com — Compress PDF to 144dpi
- downforeveryoneorjustme.com — no access: site problem or user problem?