# smart-tools.xyz — productivity and documents software — 2 of 5

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> Probe-verified (tier 2 of 3). Last checked 2026-09-26. 2 of 5 capability checks passed. 2 unknown.

- host: smart-tools.xyz
- url: https://smart-tools.xyz/
- category: productivity and documents software
- type: tool
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-09-26 against rubric v1.2. 2 of 5 checks passed. 2 unknown.

- UNKNOWN — Markdown negotiation (`Accept: text/markdown`)
- UNKNOWN — Markdown twin at a predictable URL (`/page.md`)
- PASS — llms.txt (`/llms.txt`)
- FAIL — API catalog (`RFC 9727`)
- PASS — MCP server card answers (`/.well-known/mcp/server-card.json → tools/list`)

MCP tools (from tools/list on 2026-09-26): length_converter, weight_converter, temperature_converter, area_converter, volume_converter, speed_converter, pressure_converter, angle_converter, energy_converter, data_converter, time_converter, loan_calculator, mortgage_calculator, compound_interest_calculator, vat_calculator, tip_calculator, discount_calculator, percentage_calculator, salary_calculator, margin_calculator, unit_price_calculator, fuel_cost_calculator, electricity_cost_calculator, bmi_calculator, bmr_calculator, body_fat_calculator, ideal_weight_calculator, due_date_calculator, age_calculator, date_difference_calculator, hours_calculator, aspect_ratio_calculator, standard_deviation_calculator, fraction_calculator, triangle_calculator, pace_calculator, subnet_calculator, color_converter, gpa_calculator, scientific_calculator, height_converter, base64, case_converter, html_entities, url_encoder, slug_generator, remove_duplicates, text_counter, text_diff, lorem_ipsum, number_base, timestamp_converter, transliteration, uuid_generator, hash_generator, jwt_decoder, cron_parser, regex_tester, layout_fixer, wcag_contrast_checker, csv_to_json, csv_to_sql, table_to_csv, markdown_table, json_formatter, gitignore_generator, gradient_generator, htaccess_generator, meta_tag_generator, random_number_generator, robots_txt_generator, utm_builder, file_hash, password_generator

## Summary

Free browser-based calculators, unit converters, image editing, and developer tools running entirely on the user's device without uploading data or sign-up, offering 79 tools including financial, health, and text utilities.

## Context

199 sites in this index share the category "productivity and documents software"; 64 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark

How we found this site: probe discovery. This site didn't declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. [How we choose what to check, and how to opt out](https://knowngood.sh/bot)

## Where this sits

- tool: https://knowngood.sh/type/tool
- productivity and documents software: https://knowngood.sh/category/productivity-documents-software
- Browse: https://knowngood.sh/browse
- Rubric: https://knowngood.sh/benchmark