Developer Toolbox — 100% in your browser

Sharp tools. Zero uploads.

A fast, private collection of everyday developer utilities. Convert images, generate QR codes, format JSON and more — every byte stays on your device.

/

18tools
0 bytesleave your device
Freeno sign-up
Private by design

Images & Media

Convert, compress and generate images and video — all on-device.

Image Converter

Convert and compress images to WebP, AVIF, JPEG or PNG.

Featured

Image to Video

Turn a set of images into an MP4 slideshow.

Featured

Favicon Generator

Generate every favicon size plus ICO and a manifest.

Generators

Spin up QR codes, IDs, passwords and placeholder copy on demand.

QR Code Generator

Design custom QR codes with logos, colors and shapes.

Featured

UUID / ULID / NanoID

Bulk-generate UUIDs, ULIDs and NanoIDs instantly.

Password Generator

Strong, random passwords with a live strength meter.

Lorem Ipsum Generator

Placeholder text by words, sentences or paragraphs.

Encode & Decode

Translate between text and machine formats without leaking data.

Base64 Encode / Decode

Encode and decode text or files to Base64 safely.

URL Encoder / Decoder

Encode, decode and inspect URLs and query strings.

JWT Decoder

Decode and inspect JWT headers, claims and expiry.

Hash Generator

Compute MD5, SHA-1 and SHA-2 hashes of text or files.

Text & Writing

Inspect, compare and reshape text with instant feedback.

Regex Tester

Test regular expressions with live match highlighting.

Diff Checker

Compare two texts line-by-line or word-by-word.

Case Converter

Convert text between camel, snake, kebab and more.

Word Counter

Live word, character and reading-time counts.

Data & Time

Format structured data, wrangle colors and juggle timestamps.

JSON Formatter

Format, minify and validate JSON with error positions.

Color Toolkit

Convert colors, build shade scales and check contrast.

Timestamp Converter

Convert Unix timestamps to and from human dates.