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HTML Viewer

Open and read an HTML file in your browser.

  • Free
  • No signup
  • Nothing uploaded
  • No watermark

Source

0 lines
1

Rendered page

Paste something on the left, or press Sample to load an example.

Read in this tab. Nothing you paste or open is ever uploaded.

How to Use the HTML Viewer Online

HTML Viewer: before and after HTML A BEFORE HTML VIEWER HTML A AFTER

Opens an HTML file and shows it with highlighting. Useful for reading a saved page or an email export, where the markup is the thing you need to see rather than the rendered result.

No software to install Free Works on any device

Step-by-Step Guide to Using the HTML Viewer

  1. 1. Paste your content, or open a file from your device

  2. 2. The rendered view appears beside the source, updating as you edit

  3. 3. Use Format to tidy it, or Download to save what you have

Try it now

What is the HTML Viewer?

Opens an HTML file and shows it with highlighting. Useful for reading a saved page or an email export, where the markup is the thing you need to see rather than the rendered result.

HTML files

.HTML .HTM

Open and read an HTML file in your browser.

Why Use an Online File Viewer?

Not every computer has the right program for a YAML, VCF, SRT or log file, and installing one just to look inside is a chore. A viewer opens the file in your browser and shows it neatly next to its source text.

“Sometimes you just need to see what is inside the file.”
  • No software to install
  • Data laid out as tables
  • Subtitles shown with timings
  • Code tried out in the page
  • Colour-coded source text
  • Contacts and calendars readable
  • Works on shared computers
  • Private files stay local

Popular Uses for Code and Data Viewers

People open these when a file arrives and nothing on the computer will show it.

  • Checking a JSON response Open a JSON or YAML file as a readable tree instead of one long line.
  • Reading contact backups See the names and numbers inside a VCF file exported from a phone.
  • Opening calendar invites Read the date, time and place in an ICS file before adding it.
  • Checking subtitles View SRT or VTT subtitles with their timings to spot a missing line.
  • Reading log files Scroll through a server or app log with the lines laid out clearly.
  • Previewing CSV and TSV Look at a data file as a table without opening a spreadsheet program.
  • Trying a code snippet Run a short Python or JavaScript example from a tutorial and see the output.
  • Viewing SVG graphics See how an SVG icon or drawing looks next to the markup behind it.

What You Can Do with the HTML Viewer

Accepts HTML, HTM

Understands HTML structure rather than treating the file as bytes

Renders the markup and shows the source together, so you can see cause and effect

Malformed input is reported with its position instead of being quietly corrected

Why Use ToolXkit for HTML Viewer?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

File Viewers for Different Users

Developers

Inspect config, env and data files on any machine without an editor installed.

Programming students

Try small programs in Python, JavaScript or SQL without setting anything up.

IT support staff

Open logs, HAR files and settings files that users send in.

Office workers

Read contact, calendar and CSV files that arrive as email attachments.

Video editors

Check subtitle files for timing and text before a video goes out.

Data analysts

Glance at CSV, TSV, JSONL and GeoJSON files before loading them anywhere.

Best Times to View a File Online

A browser viewer is handy when you are:

  • Using a borrowed or office computer
  • Opening an unfamiliar attachment
  • Checking a file before importing it
  • Learning to code without installing
  • Debugging a settings file
  • Proofreading subtitle timings
  • Looking inside a phone backup
  • Reviewing a server log

Frequently Asked Questions

Answers to common questions about this tool.

Do I need to install anything to use the HTML Viewer?

No. HTML Viewer runs entirely in your browser — there is nothing to download, no extension and no desktop program. It works the same on Windows, macOS, Linux, Android and iPhone.

Is it safe to use the HTML Viewer online?

Safer than the usual alternative, yes. Most online tools upload your file to a server you know nothing about, where it sits until someone deletes it. Here the file never leaves your device — the processing happens in the page itself, so there is no server copy to leak, retain or sell.

Do the online compilers run real code?

Some languages, such as Python, JavaScript, TypeScript, Lua and SQL, run inside your browser. For others, the page is mainly for reading and sharing the code, so read the note on that page to know what to expect.

Does HTML Viewer cost anything or need a login?

Neither. There is no fee, no sign-up and no cap on how many files you open. It works the same on a work laptop, a home computer or a phone.

What if my file is very large?

Large logs and data files depend on your device’s memory, because the whole file is read in the browser. If a huge file feels slow, try a computer with more memory or view a smaller part of it.

Can I open a file from my phone?

Yes. Use the file picker to choose it from your phone’s storage or a downloaded attachment, and the contents appear on the page. A larger screen is easier for long files, but everything works on mobile.

Further reading

More Viewers

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