How do I see the spaces and tabs in my text?

Paste the text and read the preview panel. Every space turns into a middle dot 「·」, every tab into an arrow 「→」, and every newline shows a pilcrow 「¶」 before the line break. So an indented line like a tab plus print() reads as 「→print()」 and four leading spaces read as 「····」, which tells you at a glance whether that line is tab-indented or space-indented.

Why is trailing whitespace at the end of a line harmful?

Trailing spaces are invisible but real, so they pollute git diffs (a line shows as changed when only an unseen space moved), break YAML and Markdown that treat end-of-line spacing as meaningful, and trip up shell here-docs. This tool highlights every line that ends in whitespace and gives you a one-click copy with all of it stripped, which is the standard cleanup before a commit.

My Python file mixes tabs and spaces. How do I find where?

Turn on the tab and space markers and scan the indentation column: tab-indented lines start with 「→」 and space-indented lines start with 「····」, so the offending line stands out immediately. The counts panel also shows a mixed-indentation warning when at least one line is tab-indented and another is space-indented, which is exactly what raises Python TabError or IndentationError.

What is a non-breaking space and why does it cause bugs?

A NO-BREAK SPACE is U+00A0. It looks identical to a normal space but is a different character, so word processors and some web pastes slip it in silently. Then a string comparison fails, a number like 1 000 will not parse, or a split on a regular space misses it. This tool marks every NO-BREAK SPACE with a distinct glyph 「⍽」 and counts them, so a value that looks fine but behaves wrong is no longer a mystery.

How do I clean up trailing whitespace from a file?

Paste the text, then use the copy button under 「Trailing whitespace removed」. Every line keeps its content but loses any trailing spaces, tabs or no-break spaces, and a final newline is preserved. For example the line hello followed by three spaces comes back as just hello. Paste the cleaned text back into your editor before committing and the noisy diff disappears.

Hunt down a Python IndentationError

Python compiles fine in your head but throws TabError or IndentationError on a line that looks perfectly normal. Paste the function here, turn on tab and space markers, and scan the indent column: the line that starts with an arrow while its neighbours start with dots is the tab-in-a-space-file culprit. The mixed-indentation warning confirms it before you even read line by line.

Clean trailing whitespace before a commit

Your reviewer keeps flagging diffs full of trailing-space-only line changes. Paste the file, see every offending line highlighted, and copy the trailing-whitespace-removed version straight back into your editor. The next diff shows only the lines you actually meant to change, and the review stops being about whitespace.

Debug a value that compares unequal but looks identical

A config key matches by eye but the lookup keeps failing. Paste both strings and the marker for a NO-BREAK SPACE or a zero-width character shows the difference instantly — the one a word processor or a copy-paste from chat slipped in. Now you know whether to normalise the space or strip the invisible before the comparison.

Verify whitespace-sensitive YAML or Makefile rules

YAML cares about exact indentation and Makefiles demand a real tab in front of each recipe line. Paste the snippet and read the markers: a recipe line that starts with dots instead of an arrow explains the dreaded missing-separator error, and an over-indented YAML key shows its extra dots so you can line everything up.

Whitespace Visualizer — show spaces, tabs, newlines and hidden characters

See every space, tab, newline and hidden character — middle-dot spaces, arrow tabs, pilcrow line breaks, trailing-space highlight, browser-only

Runs locally
Category Developer & DevOps
Best for Formatting, validating, shrinking, or inspecting code-adjacent text.

Reveal every space, tab, newline and hidden character in your text, fully in your browser. Each whitespace becomes a faint visible glyph, trailing spaces are highlighted, and a NO-BREAK SPACE or zero-width character gets flagged so nothing stays invisible. Toggle what you want to see, read the counts, and copy a trailing-whitespace-free version in one click.

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What this tool does

Whitespace Visualizer makes the invisible part of your text visible. Paste a YAML file, a Python block, a config, a git diff or anything copied from a word processor, and the tool renders each whitespace character as a faint glyph you can actually read: a space becomes a middle dot, a tab becomes an arrow, and a newline shows a pilcrow before the real line break. Trailing whitespace at the end of a line is highlighted so you spot the spaces that bloat a diff, and a NO-BREAK SPACE (U+00A0) or a zero-width character gets its own marker so nothing keeps hiding. The counts panel tallies spaces, tabs, newlines and how many lines end in whitespace, and it warns when a file mixes tabs and spaces in its indentation, the classic cause of a Python IndentationError or a broken Makefile. One click copies a version with all trailing whitespace stripped. Everything runs in your browser; the text never leaves the page and nothing is uploaded.

Tool details

Input: Files + Text; The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
Output: Live result + Copy + Preview; The result area focuses on usable output, with copy, download, or preview actions when supported.
Privacy: Browser-side processing; The main tool logic does not call an external API, so inputs normally stay in the current tab.
Save / share: Shareable URL state; Key settings are encoded in the URL so another person can reopen the same setup.
Performance budget: Initial JS <= 9 KB; No WASM budget is declared, keeping the tool quick to open on mobile.
Best fit: Developer & DevOps · Developer; Category and role tags drive related tools, internal links, and quick fit checks.

How to use

1. Input

Paste or drop your content into the tool panel.
2. Process

Click the button. All processing is local in your browser.
3. Copy / Download

Copy the result or download to disk in one click.

How Whitespace Visualizer fits into your work

Use it in the small gaps between coding, reviewing, debugging, and shipping.

Developer jobs

Formatting, validating, shrinking, or inspecting code-adjacent text.
Preparing snippets for documentation, tickets, commits, or handoff.
Checking a small payload quickly without switching tools.

Developer checks

Run irreversible transforms like minify or obfuscate on a copy.
Keep secrets out of pasted snippets unless the tool explicitly stays local.
Use your normal tests or linter before shipping transformed code.

Good next steps

These links move the current task into a more complete workflow.

Real-world use cases

Hunt down a Python IndentationError
Python compiles fine in your head but throws TabError or IndentationError on a line that looks perfectly normal. Paste the function here, turn on tab and space markers, and scan the indent column: the line that starts with an arrow while its neighbours start with dots is the tab-in-a-space-file culprit. The mixed-indentation warning confirms it before you even read line by line.
Clean trailing whitespace before a commit
Your reviewer keeps flagging diffs full of trailing-space-only line changes. Paste the file, see every offending line highlighted, and copy the trailing-whitespace-removed version straight back into your editor. The next diff shows only the lines you actually meant to change, and the review stops being about whitespace.
Debug a value that compares unequal but looks identical
A config key matches by eye but the lookup keeps failing. Paste both strings and the marker for a NO-BREAK SPACE or a zero-width character shows the difference instantly — the one a word processor or a copy-paste from chat slipped in. Now you know whether to normalise the space or strip the invisible before the comparison.
Verify whitespace-sensitive YAML or Makefile rules
YAML cares about exact indentation and Makefiles demand a real tab in front of each recipe line. Paste the snippet and read the markers: a recipe line that starts with dots instead of an arrow explains the dreaded missing-separator error, and an over-indented YAML key shows its extra dots so you can line everything up.

Common pitfalls

Assuming a line is space-indented when it is actually tab-indented. They render the same width in most editors, but here a tab shows as an arrow and spaces show as dots. Reading the first glyph of each line tells you the truth and explains why a "matching" indent still broke the parser.
Treating a NO-BREAK SPACE as a normal space. U+00A0 looks like a space but is a different character, so trimming on the regular space leaves it behind and string comparisons keep failing. Watch for its distinct marker, not just the dots, before you decide the value is clean.
Copying the marked preview back into your code. The preview is a visual aid full of dots and arrows, not real text. To get usable output use the "Trailing whitespace removed" copy button, or for other transforms reach for the tabs-to-spaces or text cleaner tools linked below.

Privacy

Every step — the glyph rendering, the counts, the mixed-indentation check and the trailing-whitespace trim — is plain JavaScript that runs in your browser tab. The text you paste never leaves the page and nothing is uploaded or logged. The one caveat: the share link can encode your input in the query string, so a link pasted into chat will record that text in the recipient server's access log. If the snippet contains a secret or private data, use the copy button and paste the result instead of sharing the URL.

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Whitespace Visualizer — show spaces, tabs, newlines and hidden characters

What this tool does

Tool details

How to use

1. Input

2. Process

3. Copy / Download

How Whitespace Visualizer fits into your work

Developer jobs

Developer checks

Good next steps

Real-world use cases

Hunt down a Python IndentationError

Clean trailing whitespace before a commit

Debug a value that compares unequal but looks identical

Verify whitespace-sensitive YAML or Makefile rules

Common pitfalls

Privacy

FAQ

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