“Go”

Runs Go programs in a sandbox and shares them via link.

Generates Go structs with bson tags from JSON for MongoDB use.

Generates Go struct definitions from a JSON sample.

Runs Go snippets online.

Turns a curl command into equivalent request code in many programming languages.

Tests one regular expression against many engines such as Java, Go, .NET and PCRE.

Shows the assembly a chosen compiler produces for C++, Rust, Go and many other languages.

Free QR code generator for URLs, text and contact cards with print-ready exports.

Remaps an image's colors to the Nord theme palette or another chosen palette.

Free chart maker for bar, line and pie charts that works without signing in.

Creates several sets of unique random integers in one go, handy for drawing teams or sample groups.

Invoices, quotes, purchase orders and credit notes with autosave, no account and local processing.

Official estimator for childbirth lump sum, childcare leave benefits and social insurance exemption; results are approximate.

Indonesian tax authority's calculator page for estimating personal income tax.

Private AI chat from DuckDuckGo that offers several models; the page says no account is required.

Official household cash-flow simulator that charts income and spending over the years.

Official simulator estimating future public pension amounts under different retirement ages and work patterns; inputs are not saved.

Formats Java, Python, JavaScript and Go stack traces with automatic language detection.

Works out your VDOT fitness score from a race result and the training paces that go with it.

Official Korean dictionary with English glosses and example sentences.