Unicode Cleaner

Cleanup settings

The defaults remove zero-width spaces, byte order marks, soft hyphens and non-text control characters, and replace special spaces with ordinary spaces. Joiners, directional marks and emoji-related characters are kept unless selected.

The last six options may change spelling, text direction, emoji appearance or paragraph structure. Select only the categories you intend to change.

Find hidden Unicode characters, choose which categories to clean, and compare the changes before copying or downloading the result. Each detected character has a name, code point, count and original position.

You can also apply NFC, NFD, NFKC or NFKD normalization and standardize line endings. The complete CSV report includes every detected occurrence and every cleanup change; table pages and text previews do not limit processing.

Frequently asked questions

Is my text uploaded?

No. Text inspection, cleanup and report generation run in your browser. Your text and files are not uploaded to a server.

Why are some invisible characters kept by default?

Joiners can be part of spelling and emoji sequences, directional marks help multilingual text display correctly, and variation selectors and tags can affect emoji appearance. Review their names and positions before removing them.

Which normalization should I use?

Keep original leaves character representations unchanged. NFC combines canonically equivalent sequences, while NFD decomposes them. NFKC and NFKD also replace compatibility forms, so they may change full-width letters, ligatures or other meaningful presentation details. Review the output before reuse.

Which text files can I inspect?

Paste text or load a UTF-8 file. UTF-16 files with a byte order mark are also detected. The tool does not impose a fixed file-size limit, but processing and copying large results depend on your device and browser. You can cancel and try again.

Does this detect AI watermarks or look-alike letters?

No. This tool reports hidden and special Unicode characters. It does not identify statistical AI watermarks, rewrite wording, or determine whether visually similar letters belong to different writing systems.

Related tools: Text Formatter · Text Compare · Unicode Escape

Code Formatters

Format and beautify Java, Python, JavaScript, JSON, HTML and more; adjust indentation, spacing and line breaks.

More tools

Audio Editing & Effects

Trim, join or split recordings, remove silence or noise, and adjust volume, speed, pitch or channels.

More tools

Spreadsheet Tools

Open and edit CSV or Excel sheets, format tabular text, and convert CSV to Excel or SQL.

More tools

Markdown Tools

Write and preview Markdown, render Mermaid diagrams, and convert Markdown, HTML and tables between formats.

More tools

Text Tools

Compare passages, count words and keywords, sort or replace lines, and view DOCX text.

More tools

Dictionaries

Look up Chinese meanings, synonyms and antonyms, or find IPA pronunciations in multiple languages.

Audio Conversion & Playback

Convert between MP3, WAV, FLAC and more, play audio or raw PCM, and inspect or edit audio metadata.

JSON & Data Tools

Inspect, compare and validate JSON; test JSONPath expressions, or convert data to CSV, YAML and XML.

More tools

Speech Tools

Transcribe audio to text, generate speech from text, or record your voice in the browser.

Video Tools

Convert and compress video, trim or join clips, resize frames, and extract audio.

More tools

Video Playback & Recording

Play local or streaming video, record your screen or camera, and use your camera as an online mirror.

PDF Tools

Compress or merge PDFs, split and rearrange pages, convert pages to images, and view or compare documents.

More tools

Image Tools

Convert image formats, resize or crop photos, compress files, compare pictures, and extract text with OCR.

More tools

Image Creation

Capture and beautify screenshots, turn text into images or GIFs, draw on a whiteboard, and create word clouds or favicons.

More tools

Subtitle Tools

Edit SRT or VTT captions with a video preview, shift timing, convert formats, and manage subtitle tracks.

More tools

Archive Tools

Open ZIP, 7Z, RAR or TAR files, extract selected contents, and create new archives with optional ZIP/7Z passwords.

Encoders | Decoders

Encode and decode Base64 or Base32, escape URLs, HTML and Unicode text, and inspect JWT contents.

More tools

Number Tools

Convert number bases and values between binary, decimal and hex; turn numbers into words or text into binary.

Calculators

Work out percentages and fractions, summarize statistics, and calculate grades, discounts or aspect ratios.

More tools

Time Tools

Show an online clock, run a countdown or stopwatch, and calculate dates, ages or time-zone differences.

More tools

Network Tools

Check your IP and IPv6 connection, inspect HTTP requests or HAR files, and calculate CIDR address ranges.

Unit Conversions

Convert length, weight, temperature, data storage and other units.

Color Tools

Convert HEX, RGB and HSL values, extract colors from an image, check contrast, or test your display with solid colors.

QR Codes & Barcodes

Generate and scan QR codes or barcodes, including QR codes for links and Wi-Fi networks.

Developer & Security Tools

Generate hashes, UUIDs and passwords, test regular expressions, create URL slugs and check file permissions.

More tools

Utility Tools

Check screen resolution and refresh rate, measure with a screen ruler, test keys, or read from a teleprompter.

More tools

Games

2048, Minesweeper, Sudoku, Gomoku, Tank Battle

More tools