Developer & Data
Format, convert, encode and inspect data locally in your browser.
JSON Null Value Report
list paths containing explicit JSON null values without exposing unrelated scalar content.
Open tool →CSV Numeric Column Statistics
calculate count, missing values, minimum, maximum, sum, mean and median for one CSV column.
Open tool →HTTP Accept-Encoding Builder
order content-coding preferences and quality weights into a validated Accept-Encoding header.
Open tool →JSON Boolean Value Report
count true and false values and list their JSON paths without exposing unrelated scalar content.
Open tool →CSV Column Renamer
rename one CSV header with collision checks while preserving quoted cell values and row order.
Open tool →HTTP Content-Type Builder
validate a media type and build a Content-Type header with an optional charset parameter.
Open tool →JSON Object Shape Report
summarize recurring object key sets and value types without printing unrelated scalar values.
Open tool →CSV Column Reorderer
reorder CSV columns from a validated header list while preserving every row and quoted cell.
Open tool →HTTP Cache Freshness Calculator
calculate remaining freshness or staleness from current Age and max-age values.
Open tool →JSON String Length Report
list string value paths and character lengths without printing the string contents.
Open tool →CSV Column Frequency Report
count distinct values and frequencies in one validated CSV column with quoted-cell support.
Open tool →HTTP Clear-Site-Data Builder
validate and deduplicate supported storage directives for a Clear-Site-Data response header.
Open tool →JSON Property Type Report
summarize the observed JSON value types for each object property without printing scalar contents.
Open tool →CSV Column Type Inference
infer integer, number, boolean, date, text or mixed types for every CSV column.
Open tool →HTTP Priority Header Builder
build a validated Priority request header from urgency and incremental delivery preferences.
Open tool →JSON Array Length Report
list array paths, nesting levels and item counts without printing array contents.
Open tool →CSV Row Width Report
compare every CSV row width with the header and identify short or long source rows.
Open tool →HTTP Prefer Header Builder
validate common preference directives and build a deduplicated Prefer request header.
Open tool →IDN Punycode Domain Converter
Convert internationalized domain labels between readable Unicode and canonical ASCII Punycode without resolving, visiting or submitting the domain.
Open tool →ULID Generator and Inspector
Generate cryptographically random canonical ULIDs or inspect case-insensitive input as an uppercase 48-bit timestamp and 80-bit randomness value entirely in the browser.
Open tool →Secure Nano ID Generator
Create uniformly sampled Nano IDs with a URL-safe default alphabet or a custom alphabet, configurable length and cryptographically strong browser randomness.
Open tool →KSUID Generator and Inspector
Generate 27-character KSUIDs or decode their four-byte timestamp offset and sixteen-byte random payload without sending identifiers to an API.
Open tool →Snowflake ID Timestamp Inspector
Decode non-negative decimal Snowflake IDs into timestamp, worker and sequence fields using a configurable millisecond epoch and the conventional 63-bit 41/10/12 layout.
Open tool →IPv4 Subnet Calculator
Calculate an IPv4 CIDR network, broadcast address, netmask, wildcard mask, address count and RFC 3021-aware usable host range locally.
Open tool →No matching tools on this page.