BACKSERVER / RACK-01 / 19 MODULES ONLINE
The online DevOps toolbox for engineers and developers
JWT, JSON, CIDR, cron, YAML and dozens more tools in one place. The type of your input is detected automatically and the result is shown immediately. 15 of 19 tools run in your browser without sending any data to a server — free, no sign-up.
- Nothing sent to a server
- No install, no waiting
- Fully open source
AUTO-DETECT
Waiting for input
Sample
Waiting for input. Enter some text or pick a sample.
- JWT → decode and expiry
- CIDR → range and host count
- JSON / YAML → validation
- Cron → fields and explanation
- Epoch → readable date
- Base64 / URL → Decode
Detection and preview run in your browser and no data is sent.
19U
tools ready
15/19
run in your browser
5
categories
0
sign-ups and ads
01 / MODULES
Tools
Search by tool name or by capability — for example HMAC, Ingress or VLSM.
No tool matches that. Maybe it does not exist yet — request it on GitHub.
RACK FOR
Format & convert
Format, validate and convert data between formats 6 toolsYAML Validator
[YAML] Check YAML syntax, browse it as a tree and convert it straight to JSONBase64 Encoder/Decoder
[B64] Encode and decode text or files, with Data URI output and a URL-safe modeURL Encoder/Decoder
[URL] Encode and decode URLs and parameters using URI, component or form rulesSQL Formatter
[SQL] Pretty-print SQL with a dialect of your choice and consistent keyword casingUnix Timestamp Converter
[TS] Convert timestamps to dates and back, with millisecond and Jalali support
RACK SEC
Security & crypto
Inspect tokens, generate hashes and check TLS certificates 3 toolsJWT Decoder
[JWT] Decode a token’s header and payload, and verify its signature with an HMAC or public keyHash Generator
[#] Hash text or files, build an HMAC, and compare the result against a reference digestSSL Certificate Checker
[SSL] Check expiry, issuer, SAN domains and the full certificate trust chain
RACK NET
Network & server
Subnet maths plus live DNS and HTTP inspection 4 toolsCIDR Calculator
[CIDR] Address range, broadcast, host count and the binary mask from CIDR notationVLSM Subnet Calculator
[IP] Split a network into named segments and get the complete range for each subnetDNS Lookup
[DNS] Live domain record lookups, with the full value and TTL of every recordHTTP Headers Viewer
[HTTP] See the status code, the redirect chain and every response header of a URL or API
RACK DEV
DevOps & containers
Day-to-day Docker, Nginx, Kubernetes and scheduling 5 toolsKubernetes YAML Generator
[K8S] Generate ready-to-apply Deployment, Service, Ingress, HPA and ConfigMap manifests from a formNginx Config Helper
[NGX] Build a server block and catch common Nginx config mistakes before you reloadDocker Compose Validator
[YML] Validate docker-compose.yml and see every issue grouped by severityDocker Image Size Calculator
[IMG] Layer-by-layer image size straight from the registry, plus Dockerfile lintingCron Expression Generator
[CRON] Build and explain a cron expression, with a preview of the next few runs
RACK TEX
Text & patterns
Working with strings and regular expressions 1 tools
Runs in your browser: nothing you type is transmitted
Needs the server: only the domain or URL you enter is looked up
SISTER PROJECT · dacker.ir
apt and dnf without the 403: a Linux package repository inside Iran
dacker.ir is Backserver’s sister project: an apt and dnf repository for Docker, Kubernetes, Terraform, nginx, PostgreSQL, GitLab and dozens more packages that are unreachable from Iranian servers or answer with a 403. Just add the key and the repository, then install packages as usual.
- Ubuntu 22.04
- Ubuntu 24.04
- AlmaLinux 8/9
- Rocky 8/9
- RHEL 8/9
03 / SPEC
Why Backserver?
Online tools are usually either full of ads or send your data to a server; Backserver does neither.
Your data goes nowhere
Paste tokens, logs and private config without a second thought: 15 of 19 tools run entirely in the browser, and the rest are clearly labelled.
No sign-up, no ads
No account, no rate limit, no pop-ups. The page loads and the tool is ready.
Find it by what it does
You do not need the exact tool name. Hit Ctrl+K and search for the job instead — HMAC, broadcast or Ingress.
Open source and bilingual
The whole codebase is on GitHub, and the interface was built for right-to-left and left-to-right from the start — not bolted on afterwards.
04 / FAQ
Frequently asked questions
Answers to the questions people ask before using an online tool.
01 Is anything I enter stored anywhere?
No. 15 of the 19 tools run entirely in JavaScript inside your browser, so your input never leaves your device. The rest (DNS Lookup, SSL Checker, HTTP Headers) need a network request by their very nature — they are marked “Needs the server” on their card, and even then only the domain or URL you type is processed.
02 How does automatic input detection on the home page work?
Enter any text in the box at the top of the page; its type (JWT, JSON, CIDR, cron, Base64, YAML, SQL and more) is identified in your browser and an instant preview is shown. One click opens the same text in the right tool. The whole process is local — no data is sent to a server.
03 Do I need an account?
No. No sign-up, no usage limits, no ads. Open the tool and start.
04 What is the fastest way to reach a tool?
Press
Ctrl + K (⌘ + K on a Mac) anywhere on the site to open the command palette. Type a tool name or just a capability — HMAC, Ingress, VLSM. Move with the arrow keys and open with Enter.05 What is dacker.ir and how is it related to Backserver?
dacker.ir is Backserver’s sister project: an apt and dnf repository hosted inside Iran for packages such as Docker, Kubernetes, Terraform and nginx that are either unreachable from Iranian servers or answer with a 403. Backserver is the everyday toolbox; dacker.ir is dependable software installation on servers.
06 Can I suggest a new tool?
Yes. The project is open source — open an issue on the GitHub repository to request a tool or report a bug.