bnto
Editor Beta
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bnto

Packed with love. Free. Open source. Runs on your machine.

Image

  • Compress Images
  • Resize Images
  • Convert Image Format
  • Optimize Images for Web
  • Generate Thumbnails
  • Compress & Rename
  • Strip EXIF
  • Watermark Images

Data

  • Clean CSV
  • Rename CSV Columns
  • CSV to JSON
  • Merge CSV
  • Standardize CSV

File

  • Rename Files
  • Number Files
  • Sanitize Filenames

Vector

  • SVG to PNG
  • SVG to JPEG
  • Optimize SVG

Company

  • FAQ
  • Privacy
  • GitHub

MIT Licensed. Free and open source.

MotorwayPrivacy Policy

Sanitize Filenames Online Free

Clean filenames for web-safe or cross-platform use. Free, no signup required.

Filename cleanupWeb-safeBrowser-based

or drop here

accepts any files

Want to customize or build your own?

How it works

Three steps. No signup.

No catches

Why bnto

No catches. No compromises.

Browser-based privacy

Files never leave your device. The Rust engine compiles to WebAssembly and runs entirely in your browser tab.

No signup required

Open the page, drop your files, download results. No account, no email, no credit card.

Free forever

No daily caps, no watermarks, no quality limits. The engine runs on your hardware, so it costs nothing to operate.

Open source

The entire engine, CLI, and web app are MIT licensed. Inspect the code, verify the operations, or contribute.

Features

Pattern-based renaming

Define rename patterns once and apply them to every file in the batch. Add prefixes, suffixes, sequential numbers, or date stamps without manual editing.

Preview before applying

See the before-and-after file names before committing. Catch mistakes early and adjust your pattern until every name looks right.

Unlimited batch size

Rename 10 files or 10,000. The engine processes them all in a single pass. No per-file fees, no upload queues, no waiting.

Built for real workflows

Every feature is designed around how people actually work: batch processing, format flexibility, and zero configuration. Drop your files and go.

Related tools

More file tools

File

Rename Files

Batch rename files with patterns. Free, no signup required.

Batch renamePattern matchingBrowser-based
File

Number Files

Add sequential numbers to filenames. Free, no signup required.

Sequential numberingBatch renameBrowser-based
FAQ

Common questions