Hugo's Daily Tools

Small tools. Real problems. A slightly questionable mahjong team.

A growing collection of practical utilities by Hugo Syarof. Developer helpers, text and data converters, and file utilities — each focused on doing one useful thing well.

Browse the tools

Tool	What it does	Runtime
JSON Diff	Compare API responses or JSON files with precise field-level changes	Python 3.9+, no dependencies
JSON Merge Patch	Apply object updates, removals, and replacements from a merge-patch document	Python 3.9+, no dependencies
JSON Redact	Replace explicitly selected JSON Pointer values with a fixed string	Python 3.9+, no dependencies
JSON Flatten	Convert nested JSON leaves into JSON Pointer and value records	Python 3.9+, no dependencies
JSON Stats	Count JSON structure, depth, members, items, and value types without printing values	Python 3.9+, no dependencies
Env Audit	Check dotenv files for missing, undocumented, duplicate, empty, or malformed keys without exposing values	Python 3.9+, no dependencies
Duplicate Finder	Find byte-identical files safely and estimate reclaimable space without deleting anything	Python 3.9+, no dependencies
JSONL Check	Validate JSON Lines with line-level errors, duplicate-key checks, and bounded error details	Python 3.9+, no dependencies
CSV Audit	Check CSV headers, quoting, encoding, and row widths without exposing field contents	Python 3.9+, no dependencies
CSV Select	Select and reorder CSV columns with header and row-width validation	Python 3.9+, no dependencies
CSV Join	Join two CSV files by named key columns with inner, left, or full semantics	Python 3.9+, no dependencies
CSV to JSONL	Convert header-based CSV rows into JSON objects while retaining string values	Python 3.9+, no dependencies
Cron Next	Validate five-field cron expressions and preview timezone-aware run times	Python 3.9+, no dependencies
Hash Manifest	Create and verify deterministic SHA-256 inventories without following symlinks	Python 3.9+, no dependencies
Markdown Link Check	Check whether relative file targets in common Markdown link forms exist	Python 3.9+, no dependencies
Port Wait	Wait for a TCP endpoint with retries, timeout, stability checks, and JSON output	Python 3.9+, no dependencies
Line Unique	Remove duplicate text lines while retaining first-seen order	Python 3.9+, no dependencies
Line Sample	Select deterministic reservoir samples while preserving line bytes and source order	Python 3.9+, no dependencies
Subnet Inspect	Inspect IPv4/IPv6 CIDRs and check address membership	Python 3.9+, no dependencies
Query Decode	Decode form query strings into ordered name/value pairs	Python 3.10+, no dependencies
EOL Inspect	Count LF, CRLF and CR endings and check final newlines	Python 3.9+, no dependencies
Epoch Convert	Convert Unix timestamps and offset-aware ISO datetimes	Python 3.9+, no dependencies
Path Collisions	Find Unicode-normalized and case-insensitive path collisions	Python 3.9+, no dependencies
JSON Select	Extract JSON values using explicit keys and array indexes	Python 3.9+, no dependencies
Tree Usage	Summarize file counts and logical bytes by final extension	Python 3.9+, no dependencies
File Compare	Compare files and report the first differing byte offset	Python 3.9+, no dependencies
Hex View	Display binary input as byte offsets, hexadecimal values, and printable ASCII	Python 3.9+, no dependencies
Duration Sum	Add signed durations with integer microsecond precision	Python 3.9+, no dependencies
Base64 Codec	Encode bytes or validate and decode padded Base64	Python 3.9+, no dependencies
ZIP Inventory	Summarize ZIP entry sizes, duplicate names and largest files without extraction	Python 3.9+, no dependencies
TAR Inventory	Summarize TAR entry types, sizes, duplicate names, and suspicious paths without extraction	Python 3.9+, no dependencies
Gzip Check	Validate gzip data and report sizes plus the uncompressed SHA-256 digest	Python 3.9+, no dependencies
Retry Command	Retry local commands after nonzero exits or per-attempt timeouts	Python 3.9+, no dependencies
Text Transcode	Convert explicit text encodings with strict errors and binary stdout	Python 3.9+, no dependencies
Byte Size	Parse exact byte quantities and display decimal and binary sizes	Python 3.9+, no dependencies
List Compare	Compare UTF-8 line-list membership in first-seen order	Python 3.9+, no dependencies
Unicode Inspect	Locate selected Unicode control, format and separator characters	Python 3.9+, no dependencies
Unicode Normalize	Normalize UTF-8 text as NFC, NFD, NFKC, or NFKD, or check whether changes are needed	Python 3.9+, no dependencies
JWT Inspect	Decode compact token JSON without verifying its signature	Python 3.9+, no dependencies
UUID Inspect	Normalize UUID text and report its encoded version, variant, and forms	Python 3.9+, no dependencies
SemVer Compare	Compare Semantic Versions with prerelease precedence and ignored build metadata	Python 3.9+, no dependencies
PEM Inspect	Inventory strict base64 PEM blocks by label, size, digest, and duplicate payload	Python 3.9+, no dependencies
Unix Mode	Convert Unix permission bits between octal and symbolic forms	Python 3.9+, no dependencies

Getting started

Clone the repository:

git clone https://github.com/HugoIrfenz/DailyTools.git
cd DailyTools

Pick a tool from the catalog and follow its README. There is no global installation step: each utility documents its own runtime, dependencies, commands, examples, and limitations.

Structure

DailyTools/
├── README.md
├── assets/
│   └── dailytools-thumbnail.jpg
└── tools/
    ├── json-redact/
    │   ├── README.md
    │   ├── json_redact.py
    │   └── test_json_redact.py
    ├── csv-join/
    │   ├── README.md
    │   ├── csv_join.py
    │   └── test_csv_join.py
    ├── markdown-link-check/
    │   ├── README.md
    │   ├── markdown_link_check.py
    │   └── test_markdown_link_check.py
    ├── tar-inventory/
    │   ├── README.md
    │   ├── tar_inventory.py
    │   └── test_tar_inventory.py
    ├── hex-view/
    │   ├── README.md
    │   ├── hex_view.py
    │   └── test_hex_view.py
    ├── unicode-normalize/
    │   ├── README.md
    │   ├── unicode_normalize.py
    │   └── test_unicode_normalize.py
    ├── line-sample/
    │   ├── README.md
    │   ├── line_sample.py
    │   └── test_line_sample.py
    ├── gzip-check/
    │   ├── README.md
    │   ├── gzip_check.py
    │   └── test_gzip_check.py
    ├── json-stats/
    │   ├── README.md
    │   ├── json_stats.py
    │   └── test_json_stats.py
    ├── unix-mode/
    │   ├── README.md
    │   ├── unix_mode.py
    │   └── test_unix_mode.py
    ├── csv-to-jsonl/
    │   ├── README.md
    │   ├── csv_to_jsonl.py
    │   └── test_csv_to_jsonl.py
    ├── json-flatten/
    │   ├── README.md
    │   ├── json_flatten.py
    │   └── test_json_flatten.py
    ├── pem-inspect/
    │   ├── README.md
    │   ├── pem_inspect.py
    │   └── test_pem_inspect.py
    ├── semver-compare/
    │   ├── README.md
    │   ├── semver_compare.py
    │   └── test_semver_compare.py
    ├── json-merge-patch/
    │   ├── README.md
    │   ├── json_merge_patch.py
    │   └── test_json_merge_patch.py
    ├── uuid-inspect/
    │   ├── README.md
    │   ├── uuid_inspect.py
    │   └── test_uuid_inspect.py
    ├── csv-select/
    │   ├── README.md
    │   ├── csv_select.py
    │   └── test_csv_select.py
    ├── jwt-inspect/
    │   ├── README.md
    │   ├── jwt_inspect.py
    │   └── test_jwt_inspect.py
    ├── unicode-inspect/
    │   ├── README.md
    │   ├── unicode_inspect.py
    │   └── test_unicode_inspect.py
    ├── list-compare/
    │   ├── README.md
    │   ├── list_compare.py
    │   └── test_list_compare.py
    ├── byte-size/
    │   ├── README.md
    │   ├── byte_size.py
    │   └── test_byte_size.py
    ├── text-transcode/
    │   ├── README.md
    │   ├── text_transcode.py
    │   └── test_text_transcode.py
    ├── retry-command/
    │   ├── README.md
    │   ├── retry_command.py
    │   └── test_retry_command.py
    ├── zip-inventory/
    │   ├── README.md
    │   ├── zip_inventory.py
    │   └── test_zip_inventory.py
    ├── base64-codec/
    │   ├── README.md
    │   ├── base64_codec.py
    │   └── test_base64_codec.py
    ├── duration-sum/
    │   ├── README.md
    │   ├── duration_sum.py
    │   └── test_duration_sum.py
    ├── file-compare/
    │   ├── README.md
    │   ├── file_compare.py
    │   └── test_file_compare.py
    ├── tree-usage/
    │   ├── README.md
    │   └── ...source files
    ├── json-select/
    │   ├── README.md
    │   └── ...source files
    ├── path-collisions/
    │   ├── README.md
    │   └── ...source files
    ├── epoch-convert/
    │   ├── README.md
    │   └── ...source files
    ├── eol-inspect/
    │   ├── README.md
    │   └── ...source files
    ├── query-decode/
    │   ├── README.md
    │   └── ...source files
    ├── cron-next/
    │   ├── README.md
    │   └── ...source files
    ├── csv-audit/
    │   ├── README.md
    │   └── ...source files
    ├── duplicate-finder/
    │   ├── README.md
    │   └── ...source files
    ├── env-audit/
    │   ├── README.md
    │   └── ...source files
    ├── hash-manifest/
    │   ├── README.md
    │   └── ...source files
    ├── json-diff/
    │   ├── README.md
    │   └── ...source files
    ├── jsonl-check/
    │   ├── README.md
    │   └── ...source files
    ├── line-unique/
    │   ├── README.md
    │   └── ...source files
    ├── port-wait/
    │   ├── README.md
    │   └── ...source files
    └── subnet-inspect/
        ├── README.md
        └── ...source files

How this collection grows

New utilities are selected and built through a daily automation scheduled for 12:00 WIB (Asia/Jakarta). Each run is tasked with inspecting the existing collection, choosing a useful idea, checking its behavior, and publishing the code together with documentation. Failed runs are reported rather than treated as successful releases.

Quality bar

• Useful: solve a concrete problem; no empty activity commits.
• Simple: keep setup understandable and dependencies minimal.
• Verified: check normal usage and relevant edge cases before release.
• Documented: include copyable commands, examples, and honest limitations.
• Local when practical: explain any network access or external service requirements.
• Careful with files: document side effects and preserve unrelated work.

Ideas and contributions

Open an issue with the problem you want to solve, an example input, and the desired output. Improvements to existing tools are welcome through pull requests.

Cover

The AI-generated cover features a realistic cat and fish playing mahjong. Created for this repository; the artwork is stored in assets/dailytools-thumbnail.jpg.

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Built by Hugo Syarof, with Angela helping turn little ideas into working tools.