Developer & Data
Format, convert, encode and inspect data locally in your browser.
HTTP Accept Header Builder
compose and validate an ordered Accept header from media types and quality weights.
Open tool →Content-Disposition Header Builder
create an attachment or inline header with safe ASCII fallback and UTF-8 filename encoding.
Open tool →CSV Delimiter Detector
compare common delimiters across sample rows and report the most structurally consistent CSV shape.
Open tool →JSON Type Profile
summarize nested JSON value types, depth, object keys and array items without exposing the document.
Open tool →CSV Column Profiler
measure completeness, uniqueness and numeric coverage for each column in a pasted comma-delimited table.
Open tool →HTTP Link Header Builder
compose a validated Link response header for preload, canonical or alternate relationships.
Open tool →JSON Shape Comparator
compare JSON property paths and value types while ignoring scalar values in both documents.
Open tool →CSV Row Filter
filter comma-delimited rows by a selected column and case-insensitive text match while preserving valid CSV quoting.
Open tool →HTTP Vary Header Builder
deduplicate and validate request-header names for a cache-safe Vary response header.
Open tool →Accept-Language Header Builder
order language preferences and quality weights into a syntactically valid request header.
Open tool →JSON Numeric Statistics
calculate finite-number count, minimum, maximum, sum, mean and median across nested JSON.
Open tool →HTTP ETag Builder
generate strong or weak SHA-256-based entity tags for pasted content using Web Crypto locally.
Open tool →JSON Path & Value Search
search nested JSON keys, paths and scalar values with bounded case-insensitive matching.
Open tool →CSV Column Selector
keep selected named columns from a valid CSV table while preserving row order and correct quoting.
Open tool →HTTP Retry-After Builder
create a validated Retry-After response header using delay seconds or an HTTP date.
Open tool →JSON Key Path Extractor
list unique object-key paths from nested JSON without including private scalar values.
Open tool →CSV Row Sorter
sort valid CSV rows by a named column using numeric or natural text order while keeping the header.
Open tool →HTTP Content-Language Builder
validate and deduplicate language tags for a Content-Language response header.
Open tool →JSON Property Renamer
rename an exact object property recursively with collision protection while preserving JSON value types.
Open tool →CSV Empty Cell Report
measure missing CSV cells by row and column without changing or uploading the table.
Open tool →HTTP Last-Modified Builder
convert a validated UTC date and time into a standards-shaped Last-Modified response header.
Open tool →JSON Array Sorter
sort a JSON array of scalars or objects by one property with numeric and natural-text ordering.
Open tool →CSV Duplicate Row Report
identify exact duplicate CSV rows and their source line numbers while respecting quoted cells.
Open tool →HTTP Allow Header Builder
validate and deduplicate HTTP method names for an Allow response header.
Open tool →No matching tools on this page.