Build / Secure / Modernise
Practical tools for real-world engineering challenges
67 free tools in the library across 9 categories, for designing, building, securing and modernising integrations, APIs and AI systems — 66 available now, 1 coming soon.
- Free, no sign-up
- 66 tools run locally in your browser
- Built for real work
Coming soonAI discoverability readiness scan
67 tools · 66 available now · 1 coming soon
- Integration & B2B
CSV ↔ JSON converter
Convert flat files to JSON and back, with a real RFC 4180 parser — quoted delimiters, embedded newlines and leading zeros all survive.Open toolRuns locally - APIs & Agentic AI
Agent blast-radius calculator
Assume the agent misuses every tool it has. What is the worst outcome, what is irreversible, and do your controls actually constrain it?Open toolRuns locally - Migration & Modernisation
Cutover runbook builder
A runbook skeleton with rollback points marked and the go/no-go placed where rollback still fits in the window.Open toolRuns locally - Security & DevSecOps
CI/CD workflow security linter
Scan a GitHub Actions or GitLab CI file for the pipeline failures that get exploited — script injection from pull request titles, unpinned actions, and pull_request_target building fork code.Open toolRuns locally - Quantum Readiness
Post-quantum exposure calculator
Data you send today has to stay secret for years. Check whether it outlives your own migration plan — and your own assumptions.Open toolRuns locally - AI Discovery & Web Governance
AI crawler policy builder
Compose a robots.txt covering search and AI-related crawlers, with per-agent allow and disallow rules and your sitemap.Open toolRuns locally - Developer Utilities
Base64 encoder & decoder
UTF-8 safe in both directions, including the URL-safe variant used by JWTs and OAuth.Open toolRuns locally - Business Finance
Business break-even calculator
Find the contribution per unit and sales volume needed to cover fixed costs, with editable baseline and proposed scenarios.Open toolRuns locally - Career & Talent
ATS Resume Checker
Check resume readability, parsing, requirement coverage and evidence quality. No guarantee of an ATS outcome.Open toolRuns locally - Integration & B2B
EDI viewer & validator (X12 + EDIFACT)
Parse an X12 or EDIFACT interchange into named segments and elements, and check the control references and segment counts actually agree — the usual reason a partner rejects a file.Open toolRuns locally - APIs & Agentic AI
Agent cost & context calculator
An agent loop re-sends its whole conversation every turn, so cost grows with the square of turn count. See what your loop actually costs, and what caching changes.Open toolRuns locally - Migration & Modernisation
Function Point estimator
IFPUG function point counting, with the five components restated for integration rather than for screens — and every step of the arithmetic shown.Open toolRuns locally - Security & DevSecOps
JWT decoder
Decode a JSON Web Token and read its claims, with expiry in plain language. Runs in your browser — the token is never transmitted.Open toolRuns locally - Quantum Readiness
Post-quantum migration matrix
Paste a cryptographic inventory and see what each algorithm becomes under NIST's post-quantum standards — with migration difficulty driven by where the key lives, not just which algorithm it is.Open toolRuns locally - AI Discovery & Web Governance
AI discoverability readiness scan
Check whether a site publishes the machine-readable signals that AI-oriented crawlers and tools look for — robots directives, sitemap, structured data, canonical and metadata.What it will checkComing soon - Developer Utilities
Cron expression explainer
Turn a cron expression into plain English and see its next five runs — including the day-of-week trap that makes jobs fire twice as often as intended.Open toolRuns locally - Business Finance
Business burn & runway calculator
Compare available cash, monthly cash receipts and expenses under constant-flow assumptions; distinguish net burn from cash generation.Open toolRuns locally - Career & Talent
InterviewIQ
Prepare structured interview questions from job requirements and documented candidate evidence, with inspectable reasons.Open toolRuns locally - Integration & B2B
Encoding & mojibake fixer
Repair text mangled by the wrong codepage — café back to café — and expose invisible characters like a stray byte order mark.Open toolRuns locally - APIs & Agentic AI
Agent-readiness scorecard
Twelve questions about your estate, none about which model you use. Scores whether an agentic workflow would survive security review.Open toolRuns locally - Migration & Modernisation
Interface math calculator
How many interfaces does point-to-point actually cost you, against routing through a layer? Run it on your own estate size.Open toolRuns locally - Security & DevSecOps
OAuth PKCE verifier & S256 challenge
Generate a cryptographically random PKCE verifier and S256 challenge locally. Inspect the RFC 7636 example without performing an OAuth exchange.Open toolRuns locally - AI Discovery & Web Governance
Enterprise Prompt Workbench
Build structured prompts for architecture, APIs, integration, migration, agentic AI and enterprise engineering workflows.Open toolRuns locally - Developer Utilities
Epoch & timestamp converter
Convert Unix time to dates and back, with automatic seconds-versus-milliseconds detection.Open toolRuns locally - Business Finance
Business financing comparator
Compare reducing and flat-rate financing, repayment schedules and one-off prepayment. Calculate simple and compound interest with explicit rate conventions.Open toolRuns locally - Career & Talent
JDLens
Inspect job-description requirements, wording clarity and interviewability, with reasons tied to the source text.Open toolRuns locally - Integration & B2B
Fixed-width flat file parser
Parse fixed-width extracts with multiple record types and implied decimals — the shape real SAP, banking and retail files actually take.Open toolRuns locally - APIs & Agentic AI
HTTP status code reference
Search a dated curated subset of common IANA HTTP status codes by code or name. Includes category labels and the authoritative registry link.Open toolRuns locally - Migration & Modernisation
iPaaS readiness assessment
Thirty questions across estate, connectivity, security, delivery, operations and organisation — scored, with each gap's actual consequence named.Open toolRuns locally - Security & DevSecOps
Prompt secret scanner
Check a prompt or assembled context for credentials, tokens, connection strings and personal data before it leaves the building.Open toolRuns locally - AI Discovery & Web Governance
LLM discovery file builder
Create an llms.txt-style discovery file describing your important pages, documentation and tools to AI-oriented systems.Open toolRuns locally - Developer Utilities
JSON diff
Compare two payloads by structure rather than text. Reordered keys are ignored; type changes are flagged.Open toolRuns locally - Business Finance
Entered-rate GST calculator
Calculate inclusive or exclusive invoice tax using a rate you enter. Shows base, tax and total without slab or eligibility assumptions.Open toolRuns locally - Career & Talent
ResumeLens
Inspect resume structure, achievements, evidence quality and what is not documented, with source traceability.Open toolRuns locally - Integration & B2B
HL7 v2 message viewer
Parse an HL7 v2 message into named segments and fields, with the MSH numbering quirk handled correctly and the header validated.Open toolRuns locally - APIs & Agentic AI
JSON Schema generator
Infer a draft 2020-12 schema from sample JSON, merging every array element so optional fields are not marked required.Open toolRuns locally - Migration & Modernisation
Migration risk register
Twenty risks that materialise on integration migrations, each with an early warning sign. Score them for your estate and export.Open toolRuns locally - Security & DevSecOps
Regex tester & ReDoS checker
Test a pattern, then find out whether someone can hang your service with it — catastrophic backtracking found by structural analysis and by measurement.Open toolRuns locally - AI Discovery & Web Governance
Structured data readiness builder
Build and check JSON-LD for the handful of schema types that actually matter — Organization, WebSite, Article, SoftwareApplication, FAQPage and BreadcrumbList.Open toolRuns locally - Developer Utilities
Seeded Schema-Driven Test Data Generator
Generate reproducible synthetic JSON fixtures from a bounded JSON Schema subset, validate every result locally, and export it for API and integration tests.Open toolRuns locally - Business Finance
Project business-case workbench
Evaluate ROI, NPV, IRR and dated XIRR; explore future value, inflation, WACC and historical growth using entered assumptions.Open toolRuns locally - Career & Talent
SkillLens
See which skills are demonstrated, partially evidenced or not documented in a resume, on its own or against requirements.Open toolRuns locally - Integration & B2B
Interface catalogue builder
Build the inventory every integration programme needs and almost nobody has — then see what it tells you about ownership, partner dependencies and crypto exposure.Open toolRuns locally - APIs & Agentic AI
JSONPath tester
Evaluate JSONPath against a payload and see the concrete path each match came from — filters, recursive descent, slices and regex included.Open toolRuns locally - Migration & Modernisation
Migration wave planner
Sequence an interface catalogue into delivery waves — pilot on the safe work, take the hard and critical work early, and start partner conversations first.Open toolRuns locally - Security & DevSecOps
X.509 certificate decoder
Read a PEM certificate's subject, validity, key and extensions — and see whether its key survives a quantum-capable adversary.Open toolRuns locally - Developer Utilities
SHA-256 text & file checksum
Hash entered UTF-8 text or exact local file bytes with Web Crypto, up to 1 MiB. A checksum checks content changes; it is not a digital signature.Open toolRuns locally - Business Finance
Salary change calculator
Compare gross compensation and percentage changes, normalizing entered monthly and annual salaries. No tax or take-home prediction.Open toolRuns locally - Career & Talent
TalentMatch
Match resume evidence to job-description requirements with inspectable sources and reasons. Human judgment remains essential.Open toolRuns locally - Integration & B2B
JSON ↔ XML converter
Convert between JSON and XML in both directions, in your browser. Nothing you paste leaves the page.Open toolRuns locally - APIs & Agentic AI
MCP tool-definition linter
Lint MCP or function-calling tool definitions for what fails silently — descriptions that don't say when to use a tool, undescribed parameters, missing safety annotations.Open toolRuns locally - Migration & Modernisation
Modernisation roadmap generator
Phase structure, exit criteria and indicative durations for an integration modernisation — including which phase usually absorbs the overrun.Open toolRuns locally - Developer Utilities
URL component encoder & decoder
Encode or decode one UTF-8 URL component with strict percent-escape validation. Preserve literal plus signs; no URL navigation or request execution.Open toolRuns locally - Career & Talent
VerifyIQ
Turn important documented resume claims into evidence-based verification questions. A question is not proof or a hiring decision.Open toolRuns locally - Integration & B2B
Retry & backoff simulator
Model a retry policy against the caller's deadline, and see how many attempts happen after everyone has given up — plus what nested retries do to the service at the bottom.Open toolRuns locally - APIs & Agentic AI
OpenAPI → agent tools
Convert an OpenAPI spec into MCP or function-calling definitions — and see which operations probably shouldn't be on an agent's tool surface at all.Open toolRuns locally - Migration & Modernisation
Platform migration assessor
Moving between integration platforms? See which capabilities carry across, which have no equivalent, and roughly what it costs — with the arithmetic shown.Open toolRuns locally - Developer Utilities
UUID & ULID generator
Generate UUID v4, time-ordered UUID v7 or ULIDs, in bulk, from a cryptographically secure source.Open toolRuns locally - Integration & B2B
SAP IDoc viewer
Parse an XML IDoc into a named control record and segment hierarchy, and check it carries what SAP needs to route it.Open toolRuns locally - APIs & Agentic AI
OpenAPI linter
Lint an OpenAPI 3.x spec for the things that break downstream — missing operationIds, undeclared path parameters, operations with no success response.Open toolRuns locally - Developer Utilities
YAML / JSON Workbench
Validate, convert and format YAML or JSON locally, with duplicate-key checks, bounded alias handling, copy and file exports.Open toolRuns locally - Integration & B2B
SLA & error budget calculator
Serial dependencies multiply. See what your chain actually achieves, whether your target is reachable at all, and which dependency owns most of the downtime.Open toolRuns locally - APIs & Agentic AI
Webhook signature verifier
Check an HMAC webhook signature for GitHub, Stripe, Slack or Shopify — and when it fails, find out which near-miss of your payload the sender actually signed.Open toolRuns locally - Integration & B2B
SWIFT MT & ISO 20022 viewer
Read MT messages block by block, or ISO 20022 payment XML — recomputing the total against the declared control sum.Open toolRuns locally - Integration & B2B
webMethods flow reader
Read a flow.xml and node.ndf into a readable step tree, service dependency list and hard-coded value report — the first artefacts a migration assessment needs.Open toolRuns locally - Integration & B2B
XPath tester
Evaluate XPath against XML and see the concrete path each match came from — with default namespaces detected and bound, which is why most XPath silently matches nothing.Open toolRuns locally - Integration & B2B
XSLT tester
Run an XSLT 1.0 transform in your browser — and when the output comes back empty with no error, find out which namespace mismatch stopped every template from firing.Open toolRuns locally