JSON formatter and beautifier - pretty-print or minify JSON with chosen indent and optional key sorting

European job listings search - tech and remote roles from Arbeitnow with company, location, job type, tags and posting date

Lido stETH staking APR now - current rate, seven-day average and recent daily history for Ethereum liquid staking from the Lido API

Fundraising dilution calculator - post-money valuation and investor and holder ownership after the round

Hacker News front page - current top, new, Ask HN or Show HN stories with rank, points, comments and links

Marketing ROAS and ACOS calculator from ad spend and attributed revenue

Helm chart search on Artifact Hub - find Kubernetes charts by keyword with version, repository, stars and verified publisher

HTTP health check for any URL - up or down, status code, latency, redirects and server header

CIDR subnet calculator - network, broadcast, netmask, wildcard, host range and usable hosts for an IPv4 CIDR block

Insurance deductible cost-share calculator - member cost and plan cost from allowed amount and coinsurance

ASN network lookup - holder, announced IPv4 and IPv6 prefix counts, peering policy, exchange points and facilities for any AS number (RIPEstat and PeeringDB)

IP address classifier and formatter - IPv4 or IPv6 type (private, loopback, link-local, multicast, global), integer, expanded and compressed forms

Spaceflight news articles - latest headlines on SpaceX, Starship, NASA and launches with source site, summary and link, searchable by keyword

Radioactive decay calculator from initial amount, half-life and elapsed time - remaining amount and decay constant

Radon potential for a U.S. address or coordinates (USGS and EPA) - low, moderate or high with screening range

Belgian rail departures - live NMBS/SNCB station board with destination, platform, delay and cancellations from iRail

Property coinsurance calculator from value, required percentage, coverage carried, loss and deductible

FDA drug approval lookup - application number, sponsor, original approval date, latest action, label link and products by brand or generic name

Latest runtime versions - current stable and LTS release of Node.js, Python, Go, Java, Ruby, PHP, .NET, Rust and databases with supported cycles

Magic: The Gathering card search using Scryfall query syntax - matching cards with full details