Small tools developers actually reach for.
Test files, JSON, Markdown, UUIDs, Base64, hashes, timestamps, entirely in your browser. Nothing is uploaded anywhere, there's no watermark, and no account to create.
Developer tools
Test File Generator
Generate a file of any size and extension: 100 KB PDF, 5 MB JPG, 20 MB BIN, 500 KB ZIP, for testing upload limits, dummy logins, or QA.
Open toolJSON Formatter
Format, validate, and minify JSON live as you type, with inline error location and a collapsible tree view.
Open toolMarkdown Editor
Split-pane markdown editor with a live rendered preview side by side. Export as HTML or Markdown.
Open toolUUID Generator
Bulk-generate random UUID v4 identifiers. Uppercase or no-hyphens formatting, copy one or copy all.
Open toolBase64 Encode / Decode
Text to and from Base64, UTF-8 safe. URL-safe variant, swap direction with one click.
Open toolHash Generator
MD5, SHA-1, SHA-256, and SHA-512 hashes computed live as you type, right in your browser.
Open toolTimestamp Converter
Unix timestamp to human-readable date, both ways. Local time, UTC, ISO 8601, and relative time.
Open tool