WebToolArcDraft persistence is explicit, not assumed
The editor remains unsaved by default. You can opt in to a device-local draft, save it immediately, or clear it without implying cloud backup.
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Notes & Writing Tools
Line Number Text Editor
Write or paste text in a local line-number editor with copy and download actions.
3 linesLine numbers are a visual gutter and are not inserted into your text.
Notes and files stay in this browser unless you explicitly copy, print, or download them. Browser storage can be cleared by private mode, site-data cleanup, or browser settings, so export important notes.
Practical guide and verification
Use the tool first, then apply these checks to verify the inputs, interpret the result, and hand it off without displacing the primary workflow.
Use line numbers as references, not content
The gutter is a visual index for the current text. Copying or downloading should preserve only the editor text unless you intentionally need numbered output. When sharing review notes, state whether line references apply to this exact revision because edits can shift every later line.
Preserve newline style when downstream tools care
Browsers commonly normalize editing to line-feed characters, while some systems expect CRLF or another exact byte representation. If the text will feed a compiler, patch, checksum or protocol that cares about bytes, verify the downloaded file in the destination tool rather than assuming visual lines preserve original encoding.
Use a specialist editor for syntax-aware operations
A line-number text area is useful for plain notes, logs, snippets and quick review. It does not replace syntax validation, code folding, multi-file search, structured diffs or language-aware refactoring. Move to the appropriate developer tool when the task depends on those semantics.
Treat browser-local editing as a draft unless saved
Copy and download actions create an explicit handoff. A browser tab can be closed, refreshed, suspended or cleared, and local persistence rules vary by tool. For material you cannot recreate, save a named file and verify that the downloaded text opens correctly before discarding the original source.