Elysia Tools
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Tools
Developer utilities, networking, web debugging, and automation helpers
Calculators, numerics, date logic, statistics, and finance tools
Image, audio, and video processing, conversion, and optimization tools
Color, layout, graphics, visual styling, and design helper tools
Writing, cleanup, formatting, extraction, and text analysis tools
Format, file, archive, unit, and encoding conversion tools
Development
Rewrites span/log attribute names across OpenTelemetry semantic-convention versions: http.method → http.request.method, http.status_code → http.response.status_code, http.url → url.full, db.system → db.system.name, messaging.destination → messaging.destination.name and 25+ more — applied to pasted JS/TS/Python/Go/Java/.NET source, collector YAML or Grafana dashboard JSON, with an OTel Collector transform rename map, removal/manual-split warnings, per-attribute diff stats and an unmapped-attribute report.
Convert an N-bit value to binary, Gray, one-hot and thermometer codes with a counting truth table, Hamming-distance chart and Verilog/VHDL encoder stubs.
Drop any game save file — Minecraft NBT, Unreal Engine GVAS, Palworld containers, JSON/XML/INI/Lua text saves, SQLite profiles — and get the detected format, engine versions, key progress fields and a bounded structural tree.
Validate W3C Trace Context propagation headers end to end: traceparent (version / 16-byte trace-id / 8-byte parent-id / trace-flags), tracestate (≤32 list members, tenant keys), baggage (percent-encoded values + opaque properties), OTLP export Content-Type, the gRPC grpc-trace-context-bin 25-byte binary context — plus a two-header correlation round-trip with a random child span-id collision check.
Decompose a directed or undirected graph with Tarjan's 1972 iterative SCC algorithm cross-checked against Kosaraju's two-pass; find articulation points and bridges via low-links; build the condensation DAG with a Kahn topological order; report cycles (nodes on cycles, self-loops) and depth-limited BFS/DFS traversals.
Simulate the Authorization Code flow with PKCE end to end: verifier/challenge generation, authorization URL, token exchange, ID Token validation checklist and an interception-attack demo.
Network
Parse RFC 8288 Link headers with the spec appendix-B algorithm, resolve relative URI-references against a base URL, classify rel types against the IANA registry, validate preload/prefetch hints, and simulate how a rel="next" pagination crawler walks your responses — including cycle detection.
Test .NET/C# regular expressions online with named groups ((?<name>…)), IgnoreCase/Multiline/Singleline options, match highlighting, capture-group tables, a ready-to-paste C# snippet and an IgnorePatternWhitespace preview.
Test java.util.regex patterns online: (?<name>…) named groups, possessive quantifiers and atomic groups, Pattern flags, ASCII vs UNICODE_CHARACTER_CLASS \d semantics, and ready-to-paste Java code.
Parse a raw HTTP request or curl command, estimate client↔server clock skew from the response Date header (NTP-style midpoint formula), inspect timestamp credentials (X-Amz-Date, x-ms-date, X-Timestamp, JWT iat/nbf), replay with ±skew offsets and diff the results against real tolerance windows (AWS SigV4 ±15 min, Azure, OAuth, JWT leeway).
Build complete <picture> markup with art-directed crops: per-breakpoint <source media> elements, 1x/2x density candidates or {w}-template width descriptors, optional AVIF/WebP format layers, sizes handling, CLS-safe width/height, plus HTML and JSX flavors with spec-based lint notes.
Turn an OpenAPI 3.x or Swagger 2.0 spec (JSON/YAML) into an importable Postman Collection v2.1.0 with folders, variables, auth and example responses.