Compression
Convert TAR archive to GZ format (requires 7zip command)
tar-to-gz-converterCompression
Preview contents of TAR archive without extraction
tar-previewCompression
Extract a single file from TAR archive by exact path (requires 7zip command)
tar-selective-extractCompression
Convert TAR archive to 7Z format (requires 7zip command)
tar-to-7z-converterCompression
Convert TAR archive to ZIP format (requires 7zip command)
tar-to-zip-converterMedia
Audit SRT, WebVTT, and ASS subtitles for CPS, duration, line length, overlaps, and translation expansion risk.
subtitle-reading-speed-localization-auditorHealth
Calculate serum osmolality from routinely measured solutes. Conventional formula Osm = 2 × Na + Glucose/18 + BUN/2.8 (Na in mmol/L, glucose & BUN in mg/dL), or the SI-unit form Osm = 2 × Na + Glucose + Urea (all mmol/L). An optional ethanol term (EtOH/4.6) is available when a toxic-alcohol ingestion is being considered. Normal range ≈ 275–295 mOsm/kg. Values < 275 suggest hypo-osmolality (SIADH, primary polydipsia, adrenal insufficiency, hypothyroidism); values > 295 suggest hyperosmolality (hyperglycemia/HHS, hypernatremia, uremia, mannitol, toxic alcohols — the latter also raise the osmolar gap, so measure osmolality and compute the gap). Derived from Dorwart 1975, Rasouli 2014, and MDCalc. Not medical advice.
serum-osmolality-calculatorDevelopment
Translate SQL between MySQL, PostgreSQL, SQLite, BigQuery, Snowflake, and Redshift — DDL, DML, functions and types, with UNSUPPORTED warnings
sql-dialect-bridgePDF Tools
Rasterize scanned PDF pages, recognize text with Tesseract, and export an editable DOCX.
scanned-pdf-ocr-to-wordDevelopment
Decode 64-bit Snowflake-style IDs for Discord, Twitter, Mastodon, Sonyflake, Instagram, or a custom bit profile. Extract timestamp, worker/process/machine, sequence fields, align platform epochs, and infer a Discord shard when a shard count is supplied.
snowflake-discord-id-bit-decoderHealth
Estimate glomerular filtration rate (eGFR) in children (1–18 y) with the Schwartz formula. 2009 Bedside version (recommended, IDMS-traceable creatinine): eGFR = 0.413 × Height(cm) / SCr(mg/dL). 1984 Original version (legacy, pre-IDMS assays): eGFR = 0.55 × Height(cm) / SCr(mg/dL). The coefficient dropped from 0.55 to 0.413 because IDMS-standardized assays return lower creatinine values. Returns a BSA-INDEXED eGFR in mL/min/1.73 m². Derived from Schwartz GJ et al., Am J Kidney Dis 2009 (0.413) and Pediatrics 1976 (0.55). Valid for pediatric stable renal function; use CKD-EPI/MDRD for adults, not for neonates/AKI. Not medical advice.
schwartz-pediatric-gfrText Processing
Extract clean dialogue text from pasted SRT, ASS, or SSA subtitles.
srt-ass-subtitle-extract-text