LocalkitFind a tool↵

Private online tools

Tools that never
leave your browser.

Handy tools that never leave your browser. Open email files, format code and handle everyday jobs without sending anything to a server.

Try:

22 tools live0 coming soon0 bytes uploaded

Ready to use.

Open a tool and start. No install, no sign-up.

.emlEML ViewerOpen .eml files: read the message, headers and attachments..msgMSG ViewerOpen Outlook .msg files: read the message, headers and attachments.{ }JSON FormatterPretty-print, minify and validate JSON.64Base64 EncoderEncode and decode Base64 text and files.JWTJWT DecoderInspect JSON Web Token headers and claims..*Regex TesterTest regular expressions with live matches.±Diff CheckerCompare two texts side by side.#Hash GeneratorSHA-1, SHA-256 and more, computed locally.AaWord CounterCount words, characters and reading time.aACase ConvertercamelCase, snake_case, Title Case and more.IMGImage CompressorShrink JPG, PNG and WebP without uploading.QRQR Code GeneratorMake QR codes for links, Wi-Fi and text.***Password GeneratorStrong random passwords, made on your device.TTimestamp ConverterUnix time to human dates and back.%20URL EncoderEncode, decode and break down URLs.IDUUID GeneratorUUID v4, v7 and ULID, in bulk.CSVCSV ↔ JSONConvert CSV to JSON and back.YMLYAML ↔ JSONConvert YAML to JSON and back.* * *Cron ExplainerCron expressions in plain English, with next runs.#fffColor ConverterHEX, RGB, HSL, OKLCH and contrast checks.LoLorem Ipsum GeneratorPlaceholder text by paragraph, sentence or word.MDMarkdown PreviewLive Markdown preview with HTML export.

Browse by category.

Email 2

Open and inspect email files.

Text 4

Count, convert and clean up text.

Images & files 2

Resize, compress and convert.

Everyday 2

Small helpers for daily tasks.

Coming next.

The roadmap, in the open.

1

Open a tool.

Pick what you need. Each tool is a single focused page.

2

Drop your file.

Files are read by a script on your device. They are not sent anywhere.

3

Done.

View, copy or download the result. Close the tab and it is gone.

How it works.

Are my files uploaded?

No. Every tool runs in your browser. Files and text never leave your device, and there is no server to receive them.

Do I need an account?

No. There is no sign-up, no paywall and no limit on how often you use a tool.

Does it work offline?

Once a page has loaded, the tools keep working without a connection, because the processing is local.

Which tools are coming?

JSON, Base64, JWT, regex, diff, hashing, text and image helpers. See the “Coming next” section above.