The developer toolbox

Developer tools that work instantly in your browser

Format, convert, generate and inspect — dozens of fast, privacy-first utilities in one place. No accounts, no uploads, no clutter.

Popular tools

Image Optimizer

Compress and resize images without changing format.

Convert Image

Convert between JPG, PNG, WebP, AVIF, TIFF, BMP.

JSON Formatter

Format, validate and minify JSON instantly.

JSON → TypeScript

Generate TypeScript interfaces from JSON.

Base64 Encode / Decode

Encode and decode Base64 text.

JWT Decoder

Decode and inspect JSON Web Tokens locally.

UUID Generator

Generate UUID v4 identifiers in bulk.

Box Shadow Generator

Visually generate CSS box-shadow.

Gradient Generator

Create CSS linear and radial gradients visually.

Metadata Generator

Generate meta, Open Graph and Twitter card tags.

Password Generator

Generate strong, random passwords locally.

QR Generator

Generate downloadable QR codes from text or URLs.

Browse by category

Images

8 tools

JSON

7 tools

Base64

3 tools

JWT

1 tools

Hash

1 tools

UUID

1 tools

Text

6 tools

URL

3 tools

HTML

4 tools

CSS

5 tools

SVG

5 tools

Colors

5 tools

SEO

4 tools

Git

2 tools

Utilities

6 tools

Recently added

QR Reader

Decode QR codes from an image.

QR Generator

Generate downloadable QR codes from text or URLs.

Random String Generator

Generate random strings, tokens and hex.

Password Strength Checker

Estimate password strength and crack time.

Unix Timestamp Converter

Convert between Unix timestamps and dates.

Password Generator

Generate strong, random passwords locally.

Privacy-first by design

Ovnimizer processes your data locally whenever technically possible. Files and text stay on your device — nothing is uploaded to a server.

Instant

No sign-up, no waiting. Tools run the moment the page loads.

Private

Everything runs in your browser. Your data never leaves your device.

Works offline

Browser-only tools keep working without a connection.

Frequently asked questions

Are my files and data uploaded anywhere?

No. Browser-only tools process everything locally on your device. Nothing is sent to a server.

Do I need an account?

Never. Every tool works instantly with no sign-up.

Is Ovnimizer free?

Yes — Ovnimizer is a free, open-source project built for the developer community.