File Tools

Convert files to Base64, inspect EXIF metadata, and identify MIME types.

22 tools available, all running locally in your browser.

File Add BOM
Add UTF-8 BOM to file content.
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File Compare
Compare two file contents — separate them with '---' on its own line. Reports equality plus each side's size in UTF-8 bytes.
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File Deduplicate Lines
Remove duplicate lines.
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File Diff
Line-by-line diff of two files.
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File Extract Headers
Extract header/comment lines that start with '#' (Markdown headings) or '//' (code comments).
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File Hash
Compute a simple hash of file content.
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File Info
Get file content info: size, lines, words.
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File Join
Join file chunks into one.
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File JSON to TOML
Convert JSON to simple TOML.
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File Line Endings
Convert line endings between LF and CRLF. Input: content, '---' on its own line, then 'lf' or 'crlf' (other values are rejected). Lone CR characters are normalized.
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File Merge
Merge two file contents into one — separate them with '---' on its own line. Empty parts are preserved as-is.
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File Remove Empty Lines
Remove empty/blank lines.
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File Rename Batch
Batch rename files (preview only — generates a rename plan; no files are actually modified, everything runs locally in your browser).
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File Reverse Lines
Reverse the order of lines.
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File Sort Lines
Sort lines alphabetically.
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File Split
Split file content into chunks.
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File Strip BOM
Strip UTF-8 BOM from file content.
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File TOML to JSON
Convert simple TOML to JSON.
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File Trim Whitespace
Trim trailing whitespace from lines.
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File XML to JSON
Convert simple XML to JSON. Flat leaf elements map to keys; repeated sibling tags are collected into an array, so later values are not lost.
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File YAML to JSON
Convert YAML to JSON via js-yaml — supports nesting, lists, anchors and multiline scalars (YAML 1.2 core schema).
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UTF-8 Sanitize (Lone Surrogates)
Sanitizes text to valid UTF-8: lone surrogates are replaced with U+FFFD; any other input is returned unchanged. This is not a general encoding converter — GBK/Shift-JIS/Big5 and other encodings are not decoded.
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