Developer tools — Page 3
161 focused tools, ready to use in your browser.
Package Exports Resolution Workbench
Trace package.json export selection for a concrete subpath and an explicit set of active conditions.
DeveloperASN.1 DER Structure Inspector
Inspect one DER value as a bounded tag, length and value tree with exact offsets and selected primitive checks.
DeveloperCompact JWE Envelope Inspector
Inspect an encrypted JWE envelope, its untrusted protected header and the exact byte lengths of all five segments.
DeveloperConventional Commit Message Workbench
Inspect a Conventional Commit message or build a separate commit-message artifact from explicit JSON fields.
DeveloperImport Map Resolution Workbench
Resolve a module specifier through a supplied import map, including scope precedence and slash-prefix mappings.
DeveloperGit Config File Workbench
Inspect a supplied Git configuration file or normalize its supported syntax while retaining repeated settings.
DeveloperSSH Known Hosts Workbench
Inspect host-key records, test a declared host pattern/hash lookup or create a separately hashed known_hosts copy.
DeveloperNpm Dependency and Lock Metadata Inspector
Compare package.json dependency declarations with an npm lockfile and inspect repeated versions and install-script metadata.
DeveloperCompose Explicit Dependency Inspector
Trace explicit depends_on relationships in a self-contained services-only Compose model without starting containers.
DeveloperDNSSEC DS Record Builder
Calculate SHA-256 or SHA-384 DS records from a public DNSKEY field, with canonical DNS owner bytes and a key tag.
DeveloperHLS Media Playlist Timing Inspector
Inspect declared M3U8 media-segment durations, exact sequence numbers and byte ranges without fetching a stream.
DeveloperSBOM Dependency Explorer
Explore component inventories and declared dependency reachability in CycloneDX 1.6 or SPDX 2.3 JSON without fetching packages.
DeveloperCSS Flexbox Playground
Build and preview flex direction, wrapping, item sizing, alignment and gaps, then export the generated CSS.
DeveloperCSS Grid Layout Builder
Generate fixed columns or auto-fitting CSS card grids with native layout, spacing and row-size previews.
DeveloperCSS 2D Transform Lab
Preview ordered translation, rotation, scaling and skew with origin controls and an equivalent affine matrix.
DeveloperCubic Bezier Easing Lab
Plot CSS cubic-bezier timing curves and inspect eased progress without automatically playing an animation.
DeveloperResponsive Media Query Builder
Build width, orientation, pointer and preference queries and observe whether the native browser matches them.
DeveloperIndependent JSON Negative Fixture Bundle
Create a ZIP of separate controlled mutations with JSON Pointer targets and a hashed unchanged baseline.
DeveloperOpenAPI Operation Contract Explorer
Inspect local OpenAPI 3.1 operations, effective parameters, declared security alternatives and selected reference diagnostics.
DeveloperGraphQL Schema Change Comparison
Compare two local GraphQL SDL schemas and statically validate optional saved operations against both versions.
DeveloperDockerfile Stage Dependency Inspector
Trace literal build-stage dependencies and a selected target in a restricted Dockerfile, without building images.
DeveloperPrometheus Text Exposition Inspector
Inspect local Prometheus text samples, escaped labels and selected histogram/summary consistency without scraping an endpoint.
DeveloperNginx Configuration Structure Inspector
Map directive blocks, include statements and server declarations from one local Nginx configuration without running it.
DeveloperPostgreSQL Connection String Workbench
Inspect or convert a bounded libpq connection URI or keyword/value string, including multiple hosts and explicit parameter overrides.
DeveloperCloud Resource Identifier Workbench
Review a local list of concrete AWS ARNs and Azure resource IDs, with structured fields and exact duplicate witnesses.
DeveloperSigned JWT Test Fixture Builder
Create a local HS256 compact JWT test artifact from supplied JSON claims and an explicitly provided test key.
DeveloperKubernetes Resource Reference Explorer
Trace selected Pod-template references and potential Service label matches across a supplied local manifest bundle.
DeveloperLocal Web Access Log Analyzer
Summarize a bounded Apache common/combined or Nginx combined log locally, with exact known-byte totals and explicit parse diagnostics.
DeveloperSSH Client Config Workbench
Trace selected SSH client options for supplied original aliases through a bounded, one-file OpenSSH 9.5 first-pass source model.
DeveloperX.509 Certificate Field Inspector
Read bounded public certificate fields, selected extensions and SHA-256 fingerprints from local PEM certificates or DER bytes.
DeveloperRedis RESP Wire Workbench
Inspect bounded RESP2/RESP3 byte frames or build an inert command-pipeline file from explicit argument arrays.
DeveloperNpmrc Credential Scope Auditor
Review one local flat npmrc for credential URI scopes, shadowed assignments and environment reference names while omitting credential values.
DeveloperWebhook Signature Test Workbench
Generate or compare local GitHub, Stripe and Slack HMAC-SHA256 webhook fixtures while preserving the exact raw request-body bytes.
DeveloperGit Attributes Resolution Workbench
Trace selected Git attribute states across supplied virtual .gitattributes files, including source precedence and the built-in binary macro.
DeveloperSupported EditorConfig Pair Resolver
Resolve EditorConfig source pairs for explicit virtual files using a bounded selected ASCII glob/path profile with root, precedence and unset witnesses.
DeveloperSupported DNS Zone Source Workbench
Expand supplied DNS master-file names and defaults, inspect selected IN record wire fields, and download an explicit canonical zone fixture.
DeveloperWebAuthn Response Byte Inspector
Inspect supplied clientDataJSON and authenticatorData bytes, flag offsets and counters, and compare explicitly entered expected values without authentication.
DeveloperEnvironment File Drift Review
Compare multiple supplied dotenv snapshots for missing keys and exact value-equivalence groups while omitting all assignment values and value hashes.
DeveloperGitHub Actions Workflow Review
Expand bounded literal job matrices and review supplied needs dependencies, action references and authored token-permission declarations without running a workflow.
DeveloperBrowser Display Diagnostics
Read one local CSS screen, window and viewport snapshot with device-pixel ratio and optional fixed media-query checks when you explicitly run the tool.
DeveloperStatic Email CSS Inliner
Inline selected author CSS into a standards-mode HTML document with explicit cascade ordering, without rendering the supplied markup or fetching stylesheets.
DeveloperFocused Keyboard Event Tester
Inspect key, code, modifiers and repeat only inside an explicitly armed keyboard test area.
DeveloperFocused Mouse and Wheel Tester
Inspect local pointer/button and raw wheel delta-mode observations inside a deliberately armed test area.
DeveloperUnix Permission Workbench
Translate declared Unix mode bits and calculate a no-default-ACL umask creation result without touching a filesystem.
DeveloperPOSIX Relative Path Workbench
Calculate normalized absolute targets, relative routes and common ancestors from an explicit POSIX-style base path.
DeveloperPairwise Test Case Builder
Generate constrained two-way parameter cases with explicit feasible-pair coverage and selected-case witnesses.
DeveloperState Transition Test Suite Builder
Build reset-to-start source test sequences covering every reachable transition in a declared deterministic state graph.
DeveloperGitHub Issue Form Builder
Generate a real issue-form YAML draft from a bounded input, textarea, dropdown and checkbox model.