All Text Tools for Developers
Seven core text tools for developers, grouped by the job they do, plus task-specific variants and short guides. Every tool runs locally in your browser: input is processed on your device, nothing is uploaded, and each page explains exactly how its results are computed. Start from a category below, or jump straight to a task-specific page from the lists.
Text and writing
Word Counter
Words, characters with and without spaces, sentences, paragraphs and reading time, counted as you type.
Case Converter
Lowercase, UPPERCASE, Title Case, Sentence case, camelCase, snake_case and SCREAMING_SNAKE_CASE.
Data formats
JSON Formatter
Pretty-print and validate JSON with two-space indent; errors carry a line number.
CSV to JSON
Convert between CSV, JSON and NDJSON in three directions, with RFC 4180 quoting.
Encoding
URL Encoder
RFC 3986 percent encoding and decoding for whole strings, UTF-8 safe.
Base64 Encoder
UTF-8 safe Base64 in both directions; URL-safe input and missing padding accepted.
Security
Password Generator
Passwords and PINs from a cryptographically secure source, 4 to 64 characters.