Developer and Data Utilities & Operator Guides
Base64, UUIDs, Unix timestamps, hashes, JSON and SQL formatting, and other everyday developer conversions.
Quick Summary / Direct Answer
OpenTools has 45 working developer and data tools. Each one runs in your own browser tab, so your files and inputs never touch a server. There is no account and no paywall.
Category Specifications
Working tools
45
Server upload
None
Runs on
Your browser
Cost
Free, no paywall
All Developer and Data tools
Read the guide, or open the tool straight away.
JSON Editor
Run json editor in your browser tab.
JSON Diff
Run json diff in your browser tab.
JSON Path Tester
Run json path tester in your browser tab.
INI Viewer
Run ini viewer in your browser tab.
CSV to JSON
Run csv to json in your browser tab.
JWT Decoder
Run jwt decoder in your browser tab.
JWT Inspector
Run jwt inspector in your browser tab.
ULID Generator
Run ulid generator in your browser tab.
Nano ID Generator
Run nano id generator in your browser tab.
Random Token Generator
Run random token generator in your browser tab.
Password Generator
Run password generator in your browser tab.
HMAC Generator
Run hmac generator in your browser tab.
Checksum Calculator
Run checksum calculator in your browser tab.
Regex Tester
Run regex tester in your browser tab.
Regex Explainer
Run regex explainer in your browser tab.
Cron Expression Parser
Run cron expression parser in your browser tab.
Cron Expression Builder
Run cron expression builder in your browser tab.
Unix Timestamp Converter
Run unix timestamp converter in your browser tab.
Epoch Calculator
Run epoch calculator in your browser tab.
Number Base Converter
Run number base converter in your browser tab.
Binary Calculator
Run binary calculator in your browser tab.
Bitwise Calculator
Run bitwise calculator in your browser tab.
IP Address Converter
Run ip address converter in your browser tab.
IPv4 Subnet Calculator
Run ipv4 subnet calculator in your browser tab.
IPv6 Subnet Calculator
Run ipv6 subnet calculator in your browser tab.
CIDR Calculator
Run cidr calculator in your browser tab.
HTTP Header Parser
Run http header parser in your browser tab.
Cookie Parser
Run cookie parser in your browser tab.
User Agent Parser
Run user agent parser in your browser tab.
cURL to Code
Run curl to code in your browser tab.
SQL Formatter
Run sql formatter in your browser tab.
SQL Minifier
Run sql minifier in your browser tab.
SQL Parameter Binder
Run sql parameter binder in your browser tab.
GraphQL Formatter
Run graphql formatter in your browser tab.
GraphQL Variable Builder
Run graphql variable builder in your browser tab.
Gitignore Generator
Run gitignore generator in your browser tab.
Dockerignore Generator
Run dockerignore generator in your browser tab.
EditorConfig Generator
Run editorconfig generator in your browser tab.
Package JSON Inspector
Run package json inspector in your browser tab.
Semantic Version Calculator
Run semantic version calculator in your browser tab.
Chmod Calculator
Run chmod calculator in your browser tab.
Escape Sequence Viewer
Run escape sequence viewer in your browser tab.
Webhook Payload Tester
Run webhook payload tester in your browser tab.
OpenAPI Viewer
Run openapi viewer in your browser tab.
OpenAPI Example Generator
Run openapi example generator in your browser tab.