Viridian Tools

Free, single-purpose tools that run entirely in your browser.

• Password Generator

  Random character strings, memorable word phrases or encoded secrets, with a clear strength estimate.

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• QR Code Generator

  Websites, Wi-Fi, contacts, email, SMS and more. Styled, logo-ready and generated entirely in your browser.

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• Color & Palette

  Convert between every color format, generate harmonies and a 50–950 shade scale, check contrast, and export as Tailwind or CSS.

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• Timer & Stopwatch

  A countdown, a pomodoro cycle with a configurable long break, and a stopwatch with laps. Accurate even in a background tab.

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• File Converter

  Convert images, data files, PDFs and archives between formats, with every byte handled in your browser.

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• Hash & Checksum Verifier

  Compute MD5, SHA-1, SHA-256, SHA-512, BLAKE3 or CRC32 for a file and compare the result against a published checksum. Streamed, so a multi-gigabyte ISO is no problem.

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• Metadata Inspector & Scrubber

  See the camera, timestamp and GPS position inside a photo, or the author and comments inside a document, then save a clean copy without re-encoding it.

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• Secret Scanner

  Check pasted text or a config file for API keys, tokens and private keys before it gets shared or committed.

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• Random Picker & Dice

  Spin a wheel of your own entries and keep or remove the winner, roll up to six dice from d4 to d100, or draw sets of numbers from a range, all using your browser's secure random number generator.

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• JWT Inspector

  Decode a JSON Web Token into its header, payload and claims, check the expiry, or build and sign a new one.

  Planned
• JSON Workbench

  Format, minify and validate JSON, walk a large document as a tree, and pull values out with a query.

  Planned
• Text Diff

  Compare two blocks of text and see exactly what changed, line by line or word by word.

  Planned
• Regex Tester

  Test a regular expression against sample text with match highlighting and a breakdown of each group.

  Planned
• Unicode & Invisible Character Inspector

  Reveal zero-width spaces, look-alike characters and unexpected code points hiding inside a string.

  Planned
• SQL Formatter

  Reformat a query into readable, consistently indented SQL, or collapse it back down to a single line.

  Planned
• Case & Slug Converter

  Convert text between camelCase, snake_case, kebab-case, Title Case and URL-safe slugs.

  Planned
• CIDR & Subnet Calculator

  Work out network and broadcast addresses, usable host ranges and subnet splits from a CIDR block.

  Planned
• TLS Certificate Inspector

  Decode a PEM or DER certificate to read its subject, issuer, validity dates, extensions and chain.

  Planned
• DNS SPF, DKIM & DMARC Builder

  Assemble and check the TXT records that decide who is allowed to send mail as your domain.

  Planned
• systemd & cron Translator

  Turn a crontab line into a systemd timer unit, or read an existing timer back as a cron expression.

  Planned
• htpasswd Generator

  Produce bcrypt or APR1 password lines for an Apache or nginx basic-auth file.

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• Docker Compose Validator

  Check a compose file for schema errors, undefined references and the mistakes that only show up at run time.

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• UUID Generator

  Generate v4 and v7 UUIDs one at a time or in bulk, from the same unbiased random source the password tool uses.

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• Barcode Generator

  Produce EAN, UPC, Code 128 and Code 39 barcodes and export them as SVG or PNG.

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• Epoch & Timezone Converter

  Convert between Unix timestamps, ISO 8601 and a readable date in any timezone, in both directions.

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• Business-Day Calculator

  Count working days between two dates, or add working days to one, with weekends and holidays excluded.

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• SVG Optimizer

  Strip editor cruft, round coordinates and collapse paths to shrink an SVG without changing how it looks.

  Planned
• Dithering & ASCII Art Converter

  Turn an image into a dithered bitmap or a block of ASCII, with control over the palette and character set.

  Planned
• Invoice Generator

  Fill in line items and download a printable PDF invoice, with nothing stored and no account needed.

  Planned