Official MCP RegistryListed
One Million Tools
42 free deterministic utilities: JSON, CSV, YAML, encoding, hashing, JWT, cron, formatters, CSS.
First seen 21 Oct 2026. Evidence as of 21 Oct 2026.
42
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| base64_decode | Base64 string → UTF-8 text. | Not declared |
| base64_encode | UTF-8 text → Base64 string. | Not declared |
| color_convert | Convert a HEX color into RGB / HSL / HSV / CSS forms. | Not declared |
| cron_explain | Explain a cron expression in plain English. | Not declared |
| css_border_radius_build | Build a CSS border-radius value from four corner radii in px. | Not declared |
| css_box_shadow_build | Build a CSS box-shadow value from one or more layers. | Not declared |
| css_contrast_check | Compute the WCAG contrast ratio between two colors and the AA/AAA verdict. | Not declared |
| css_format | Pretty-print CSS. | Not declared |
| css_gradient_build | Build a CSS linear-gradient string from color stops + angle. | Not declared |
| csv_filter | Filter CSV rows by a column predicate (equals / contains / regex / gt / gte / lt / lte / not-empty). | Not declared |
| csv_parse | Parse CSV text into fields + preview rows with delimiter detection. | Not declared |
| csv_sort | Sort CSV rows by one column (alpha or numeric). | Not declared |
| csv_split | Split a CSV into N chunks or into files of N rows each. | Not declared |
| csv_statistics | Compute per-column summary statistics (count, min, max, mean, median) over a CSV. | Not declared |
| csv_to_json | Parse CSV text into a JSON array of objects. | Not declared |
| env_redact | Redact secrets (API keys, tokens, passwords) from logs / config / env text. | Not declared |
| hash_text | Compute a SHA-1 / SHA-256 / SHA-512 hex digest of UTF-8 text. | Not declared |
| html_format | Pretty-print HTML. | Not declared |
| js_format | Pretty-print JavaScript / TypeScript with Prettier. | Not declared |
| json_diff | Diff two JSON documents and return added/removed/changed keys. | Not declared |
| json_format | Pretty-print JSON with configurable indentation (2 spaces, 4 spaces, or tab). | Not declared |
| json_minify | Compress JSON by stripping whitespace. | Not declared |
| json_to_csv | Convert an array of JSON objects to CSV. | Not declared |
| json_to_yaml | Convert JSON to YAML. | Not declared |
| json_validate | Validate JSON syntax and return the parsed value or a line/column error. | Not declared |
| jwt_decode | Decode a JWT header + payload. Does not verify the signature. | Not declared |
| markdown_format | Normalize Markdown (list markers, trailing whitespace, blank lines). | Not declared |
| markdown_preview | Render Markdown to an HTML preview fragment with word/char counts. | Not declared |
| markdown_to_html | Convert Markdown to HTML. | Not declared |
| meta_tags_generate | Generate <title>, description, Open Graph and Twitter Card tags for a page. | Not declared |
| og_preview_build | Build an Open Graph preview metadata bundle (title / description / domain truncation). | Not declared |
| regex_test | Test a regular expression against input text and return matches with capture groups. | Not declared |
| sha256_hash | Compute a SHA-256 hex digest of UTF-8 text. | Not declared |
| slug_generate | Generate a URL slug from a string. | Not declared |
| sql_format | Pretty-print SQL. | Not declared |
| text_diff | Diff two texts and return part-level changes plus a unified string. | Not declared |
| unix_timestamp_convert | Convert a Unix timestamp (seconds or ms) to an ISO 8601 date string. | Not declared |
| url_decode | Decode percent-encoded URL text. | Not declared |
| url_encode | Percent-encode a string (component or full URI mode). | Not declared |
| uuid_generate | Generate RFC 4122 v4 UUIDs. | Not declared |
| yaml_format | Pretty-print YAML. | Not declared |
| yaml_to_json | Convert YAML to pretty-printed JSON. | Not declared |
Change history
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | io.github.lucas-project/one-million-tools | 21 Oct 2026 | 21 Oct 2026 | 1 |