21 tools · 5 games · 0 bytes uploaded

Developer tools that never see your data.

Paste a payload, get a result. Nothing is sent anywhere — every tool runs inside this tab, which is why they all keep working with your connection switched off.

Ctrl K

Client-side — no server round trip Offline — installable, works on a plane No account — nothing to sign up for

Data & Formatting

Reshape, validate and convert structured data.

JSON Formatter Beautify, minify and validate JSON with a precise error position. JSON → YAML Turn JSON into readable YAML — and convert straight back. HTML Formatter Re-indent collapsed or hand-mangled markup into something readable. JSON ↔ CSV Flatten JSON into a spreadsheet, or turn a CSV back into objects. Diff Checker Compare two texts and see exactly what moved, line by line or word by word.

Security & Crypto

Hashes, secrets and identifiers, generated locally.

Base64 Encode and decode Base64 with correct UTF-8 and URL-safe handling. UUID Generator Generate v4 and v7 UUIDs in bulk from the system CSPRNG. Password Generator High-entropy passwords and passphrases, with the entropy shown. Hash Generator SHA-1, SHA-256, SHA-384 and SHA-512 over text or a dropped file. JWT Decoder Inspect a token's header, claims and expiry without handing it to anyone.

DevOps & Cloud

Manifests, charts and compose files without a cluster.

Compose Validator Catch broken indentation, unknown keys and bad port syntax before deploy. K8s Generator Scaffold Deployment, Service, ConfigMap and Ingress manifests from a form. Helm Values Normalise values.yaml — consistent indentation, sorted keys, no tabs. Cron Builder Read a cron expression in plain English and see when it actually runs.

Dev Utilities

The small things you look up ten times a day.

Epoch Converter Epoch to human time and back, across time zones, updating live. Regex Tester Live match highlighting, capture groups and a plain-English breakdown. URL Encoder Percent-encode components or whole URLs, and inspect query strings. Case Converter camelCase, snake_case, kebab-case and six more, converted as you type.

Design & Media

Colour, images and codes — processed on your own machine.

Colour & Contrast Convert between HEX, RGB, HSL and OKLCH, and check contrast against WCAG. Image Converter Convert to WebP or AVIF, resize and compress — without uploading anything. QR Generator Make a QR code for a link, text or Wi-Fi network and download it as SVG.

Arcade

Same constraint, less usefulness

Gun Hunt Reflex shooter. Track the targets, keep the streak alive. Neon Overdrive Endless runner. The grid speeds up until you stop reacting. Pulse Bounce Physics puzzler. Read the angle before you take the shot. Gravity Flip One button. Flip gravity at exactly the right moment. Chain Reaction One tap, then watch the cascade do the rest.

Why these tools do not have a backend

Most online formatters and converters POST your input to a server, run the transformation there, and send the result back. That is easier to build, and it means a copy of whatever you pasted — an API response, a config file, a token — exists on hardware you do not control, usually in a request log you will never see.

Every tool on UtilityDock runs in your browser instead. Hashing uses the Web Crypto API, random values come from the same CSPRNG your browser uses for TLS, and parsing happens in the tab you are reading this in. The simplest proof is to open your network tab, or to disconnect entirely: the tools carry on working.

You do not have to take that on faith. Open your browser's network panel and use any tool on the site: no request carries your input.