Free Online Generators for Developers
Generate hashes, passwords, UUIDs, placeholder text, and authentication entries locally in your browser.
Choose a tool
A generated secret is only as safe as the place you put it next.
Five tools produce values you would otherwise have to write a script for: identifiers, digests, passwords, stored password entries, and filler text. All of them draw randomness from the browser cryptographic source and none of them keep a copy. What they cannot do is decide what a value is for, and almost every problem in this category comes from a value being used for something its algorithm was not chosen for.
Identifiers: pick the UUID version on purpose
UUID Generator offers v1, v4, and v7, and the difference is not cosmetic. Version 4 is 122 random bits and reveals nothing about when or where it was minted, which makes it the safe default for anything that will be exposed to a user. Version 1 embeds a timestamp and a node identifier, which is information you rarely mean to publish.
Version 7 is time-ordered, so freshly minted values sort next to each other and land near each other in a B-tree index. That is a real write-throughput benefit for a database primary key, paid for by exposing creation time. Choose v7 when index locality matters and v4 when the value must reveal nothing at all.
Secure Password Generator against htpasswd Entry Generator
These two look adjacent and produce different artifacts. Secure Password Generator produces the secret itself, with a configurable length and character set, for a human or a service to hold. htpasswd Entry Generator produces the stored form of a secret: a username and a one-way hash in the layout Apache Basic Authentication expects in a .htpasswd file.
When you do reach for htpasswd, choose bcrypt rather than SHA-1. SHA-1 in that file is an unsalted single-pass digest and is trivially attacked offline once the file leaks, while bcrypt is deliberately slow and salted. Basic Authentication also transmits the password on every request, so serve it over TLS or not at all.
Hashes are fingerprints, and placeholder text is temporary
Hash & Checksum Generator computes digests over text or a file. That is an integrity tool: confirm a download matches its published checksum, spot that two files differ, key a cache. It is not encryption, because nothing can be recovered from the output, and it is not password storage, which needs a slow salted algorithm such as bcrypt or Argon2.
Lorem Ipsum Generator exists so that a layout can be judged before the copy is written. Replace it before anything ships. Placeholder text has a different average word length than real prose, so it flatters a layout that real content will break, and it is meaningless to a screen reader and to a search engine.
Before you rely on a result
- Pick the UUID version by requirement: v4 when the value must reveal nothing, v7 when ordering and index locality matter, v1 only for legacy compatibility.
- Use bcrypt rather than SHA-1 for htpasswd entries, and serve Basic Authentication over TLS only.
- Treat a hash as an integrity fingerprint, never as encryption and never as password storage.
- Move a generated password into a secret manager immediately. Leaving it in a browser tab, a screenshot, a ticket, or a commit is the actual risk, not the generation step.
- Replace every Lorem Ipsum block with real copy before publishing, and re-check the layout afterwards.
Frequently asked questions
Is a password generated in a browser actually random?
The values come from the platform cryptographic random source, which is the same primitive used for key material, not from a predictable pseudo-random helper. The generation is sound; the weak link is what happens next, which is why a secret manager matters more than the character set you picked.
Which hash algorithm should I use?
For integrity checks, SHA-256 is the sensible default. MD5 and SHA-1 remain useful only for comparing against a legacy published checksum, since practical collisions exist for both. For storing passwords, none of these are appropriate; use bcrypt, scrypt, or Argon2.
Do generated values ever repeat?
A v4 UUID has 122 random bits, so a collision is not a practical concern at any realistic volume. Passwords are a different matter: repetition risk there is dominated by short lengths and small character sets, not by the generator.
Is anything I generate stored or logged?
No. Every value is produced in this browser tab and nothing is transmitted, saved, or written to a log. Once you navigate away it is gone, which also means you should copy a password into its destination before closing the page.
Browse all developer tools or read the developer tool guides for worked examples.