Bundlephobia
bundlephobia.com
Shows what an npm package costs your bundle before you install it
devdocs.io
One fast search box across a hundred API references, usable offline.
Every documentation set you actually use — MDN, Python, PostgreSQL, React, Rust, Docker — behind a single keyboard-driven search with no ads and no cookie banner. Enable the docs you care about and it caches them locally, so it keeps working on a train or a plane. It mirrors upstream documentation on a delay rather than replacing it, and there is nothing here beyond what the source projects ship: no comments, no community examples.
Questions
Works the moment the page loads. No account, no email, no trial. Mirrors upstream docs on a delay, so notes from the newest release are often missing.
No. DevDocs does the work inside your browser, so the file never leaves your device — you can load the page, disconnect from the network, and it still works. That makes it a reasonable choice for material containing personal data.
Mirrors upstream docs on a delay, so notes from the newest release are often missing.
Alternatives
Same category or same task, ordered by how closely they overlap.
bundlephobia.com
Shows what an npm package costs your bundle before you install it
caniuse.com
Answers whether a browser feature is safe to ship yet
crontab.guru
Translates a cron expression into a plain English schedule as you type
gchq.github.io
Chains encoding, hashing and decryption steps into a repeatable recipe
jwt.io
Decodes a JSON Web Token into readable header, claims and signature
onecompiler.com
Compiles and runs code in around seventy languages with no sign-up