# UtilityKit

> Free browser-based tools for work, development, and everyday tasks. Prefer **canonical hub tools** under `/tools/{slug}` — not thin preset aliases. No login. Inputs are processed locally and are not uploaded for tool execution.

Website: https://www.utilitykit.store
Contact: hello@utilitykit.store
Operator: SpreeCode OPC Private Limited

## For AI agents

- **Canonical tool URLs only:** `/tools/{slug}` for indexable hubs.
- **Do not invent per-preset URLs.** Example: crop 16:9 / 9:16 / 1:1 live on `/tools/crop-image-to-aspect-ratio` (ratio chips), not separate thin pages.
- **Alias URLs redirect (308)** to the hub. If a user or page mentions a synonym slug (e.g. `resize-image-to-16-9`, `jpg-to-webp-converter`, `hex-to-rgb-converter`), link the hub instead.
- Category indexes: `/category/{category}` (only lists indexable tools).
- Full catalogue hub: `/developer-tools`
- Machine sitemap (indexable hubs only): `/sitemap.xml`
- Human sitemap (categories + legal): `/sitemap-html`
- Privacy / local processing: `/privacy`
- Structured data: JSON-LD (`Organization`, `WebSite`, `WebApplication`, `FAQPage`, `BreadcrumbList`, `ItemList`, `HowTo`).

## Primary capabilities (hub examples)

Use these stable hubs; each supports multiple modes in-UI:

| Capability | Prefer this path |
|---|---|
| Format / validate JSON | `/tools/json-formatter`, `/tools/json-validator` |
| Crop any aspect ratio | `/tools/crop-image-to-aspect-ratio` |
| Freeform / smart / center / pixel crop | `/tools/freeform-image-cropper`, `/tools/smart-crop-image`, `/tools/center-crop-image`, `/tools/crop-image-by-pixels` |
| Image format convert | `/tools/universal-image-format-converter` |
| Base64 image encode/decode | `/tools/image-to-base64-converter`, `/tools/base64-to-image-converter` |
| Resize one image (all modes) | `/tools/image-resizer` |
| Batch / bulk resize + ZIP | `/tools/batch-image-resizer` |
| Color HEX/RGB/HSL/CMYK | `/tools/color-converter` |
| WCAG contrast | `/tools/contrast-checker` |
| Hash MD5/SHA* | `/tools/hash-generator` |
| JWT inspect | `/tools/jwt-decoder` |
| UUID / GUID | `/tools/uuid-generator` |
| Word/char/line stats | `/tools/word-counter` |
| Percentage modes | `/tools/percentage-calculator` |
| Basic / scientific keypad | `/tools/basic-calculator` |
| Expression evaluator | `/tools/math-expression-evaluator` |
| Average / weighted | `/tools/average-calculator` |
| Arithmetic ops | `/tools/arithmetic-calculator` |
| Powers / roots / factorial | `/tools/exponent-calculator` |
| Logarithms | `/tools/logarithm-calculator` |
| Fractions | `/tools/fraction-calculator` |
| Ratio / proportion | `/tools/ratio-calculator` |
| Number theory (prime/GCF/LCM) | `/tools/number-theory-calculator` |
| Number bases + binary math | `/tools/number-base-converter` |
| Rounding / sig figs | `/tools/rounding-calculator` |
| Scientific notation | `/tools/scientific-notation-calculator` |
| Random numbers | `/tools/random-number-generator` |
| Equation solver (linear/quadratic/systems) | `/tools/equation-solver` |
| Polynomials | `/tools/polynomial-calculator` |
| Complex numbers | `/tools/complex-number-calculator` |
| Sequences / Fibonacci | `/tools/sequence-calculator` |
| Permutation & combination | `/tools/permutation-combination-calculator` |
| Matrices | `/tools/matrix-calculator` |
| Linear interpolation | `/tools/linear-interpolation-calculator` |
| Proportionality | `/tools/proportionality-calculator` |
| Encode Base64 / URL | `/tools/base64-encoder`, `/tools/url-encoder` |
| QR codes | `/tools/qr-code-generator` |
| CSV/YAML/XML convert | `/tools/csv-to-json`, `/tools/yaml-to-json`, `/tools/xml-to-json` |

Also: SQL, CSS generators, HTML, regex, network/API (cURL), Flutter/codegen, and more under `/category/*` and `/developer-tools`.

## Consolidation policy (important)

One strong tool supports related modes (presets, ratios, formats, algorithms) when the workflow is the same. Separate tools exist only when **intent and workflow** differ (e.g. calculator vs cropper, freeform vs locked ratio, smart crop vs center crop).

Source of truth for aliases → hubs: app registry `canonicalToolSlug` / `deprecatedCanonicals`. Sitemap and robots never list aliases as indexable.

## Interaction notes

- Tools run entirely client-side after page load.
- Do not send user secrets or pasted tool content to third parties.
- Site search: navbar ⌘K / Ctrl+K (or `/developer-tools`).

## Optional

- Changelog: `/changelog`
- Report issues: `/report-issue`
- HTML sitemap: `/sitemap-html`
- XML sitemap: `/sitemap.xml`