Free Apps and Tools No Catch, No Subscription

Developer Tools: Format & Encode

3 apps

Base64 · EncodeBase64 Encoder & DecoderEncode Unicode text or files to Base64, decode Base64 safely, and switch to URL-safe output when needed.JSON · FormatJSON Formatter & ValidatorFormat, minify, sort, repair, and inspect JSON with clear line-and-column errors and a searchable tree view.URL · EncodeURL Encoder & DecoderEncode or decode a full URL, one query value, or form data, then inspect every query parameter in a readable table.

Developer Tools: IDs & Tokens

2 apps

JWT · DecodeJWT Decoder & InspectorRead JWT headers and claims, check expiry and issued times, and optionally verify HS256 signatures in your browser.UUID · GenerateUUID GeneratorCreate one or hundreds of secure UUID v4 or time-sortable UUID v7 values, then validate and inspect any UUID.

Developer Tools: Time & Automation

2 apps

Cron · GenerateCron Expression GeneratorBuild or explain a standard five-part cron schedule, validate each field, and preview the next run times in your timezone.Unix · ConvertUnix Timestamp ConverterConvert Unix seconds, milliseconds, microseconds, or nanoseconds to readable dates and turn any local date back into a timestamp.

Developer Tools: Test & Compare

2 apps

Regex · TestRegular Expression TesterTest JavaScript regular expressions live, highlight every match, inspect capture groups, and preview replacements.Text · CompareText Diff CheckerCompare text or code line by line, ignore unimportant spacing or case changes, and export a familiar unified diff.