ObjectID Generator

Create 24-character hex identifiers.

freeworks offlinenothing uploaded
Input
Output

About objectid generator

ObjectID Generator runs in the page as you use it. There is no input to submit and no result to fetch, because the whole thing happens on this side of the wire.

Everything runs client side, which is the only arrangement where a privacy claim is checkable. Open the network tab and watch it stay empty.

You will find it under IDs & generators, alongside 13 other tools for the same sort of job.

Generates valid ObjectIDs with embedded timestamp, random bytes, and incrementing counter following the BSON specification.

How to use it

01
Start it
Every control is on the tool itself. Keyboard shortcuts, where there are any, are listed beside it.
02
Watch it run
It updates in the page as you go. Nothing is sent anywhere, so it keeps working with the network off.
03
Close when done
Nothing is stored between visits. Reloading gives you a clean start rather than picking up where you left off.

Examples

Single ObjectID
Generate one MongoDB-style ObjectID
Input
1
Output
6a8c1094b3e29540757629ba
Batch ObjectIDs
Generate 3 ObjectIDs for database seeding
Input
3
Output
6a8c10941856c0152a7629bb
6a8c10941d1bd9d28a7629bc
6a8c109485f6f0a93c7629bd

Questions

Does ObjectID Generator work offline?+

Yes. It is JavaScript running in this tab, so once the page has loaded it needs nothing further from the network. Put the machine in flight mode and it carries on. Nothing you do here is sent anywhere, because there is nowhere for it to go.

Does it remember anything between visits?+

No. Reload the page and it starts from nothing. There is no account, no saved state and no cookie holding your last session. That is a deliberate trade: it cannot lose your data because it never keeps any.

Is it accurate?+

Timing comes from performance.now(), the high resolution clock the browser provides, rather than from setInterval, which drifts by a few milliseconds every tick and compounds over minutes. What can still shift things is the browser throttling a tab in the background, so leave it visible if the timing matters.

Does it make a sound?+

Where a sound makes sense, it is generated with the Web Audio API rather than loaded as a file, so there is nothing to download and nothing to block. Browsers refuse to start audio until you have interacted with the page, which is why the first press is what switches it on.

Can I use ObjectID Generator on a phone?+

Yes. The controls are sized for touch and the layout collapses to one column on a narrow screen. Bear in mind that a phone locking its screen will suspend the page, and timing stops with it.