IndexedDB Viewer — Data Inspector
Parse and display IndexedDB data exported as JSON with object store listing and record preview.
How it works
- 1Paste or type your text in the input field
- 2Click "Process" — processing happens in your browser
- 3Copy the result or download as a text file
What to do next
About IndexedDB Viewer
IndexedDB Viewer is the kind of utility you bookmark and reach for when you need it. Parse and display IndexedDB data exported as JSON with object store listing and record preview. It loads quickly, works on any modern browser, and produces a result you can download or copy in a single click.
IndexedDB Viewer is shaped around the recurring needs of two audiences: product managers comparing options, who use it as a quick utility between bigger tools, and marketers running campaigns, who use it as their primary way of getting the job done. Both groups get the same defaults and the same speed.
The right moment to reach for IndexedDB Viewer is when you have a focused web and productivity utility job that fits inside a browser tab. Open the page, drop in the file or paste your input, choose the options that matter, and the tool returns the result.
The engine behind the page is standard browser APIs. It reads your file in-memory and writes the result back into the browser. For 0 MB and below the work usually completes in seconds; larger files mostly depend on how much spare RAM your device has.
The architecture is local-first by design. Once the page is loaded, you can disconnect from the network and the tool still completes the job. The processing stack — standard browser APIs and the small UI shell wrapping it — ships with the page itself, so the tool keeps working in offline conditions, on a captive-portal Wi-Fi, or behind a corporate proxy that limits what the tab can reach.
Workflow tip: IndexedDB Viewer pairs well with localStorage Viewer and sessionStorage Viewer. Other adjacent tools you may find useful are Cookie Viewer and Cookie Analyzer. Because every tool is a separate page, you can mix and match the steps that match your job. Bookmark the ones you reach for the most.
The 0 MB ceiling on input size is the only fixed limit. Output files are produced in standard formats that every common viewer recognises, and the tool runs the same way regardless of how many times you have used it during the session.
IndexedDB Viewer is honest about scope: it handles a single, well-defined web and productivity utility step. Specialist edge-case work — uncommon formats, very large inputs, or pipelines that need scripting — is what dedicated desktop apps are for. This page handles the common case quickly.
Once the engine finishes, the output is offered as an immediate download. There is no preview gate, no email-wall, and no "register to download" intermediary — the file is yours the moment it is ready.
IndexedDB Viewer is one example of a broader pattern: utility software increasingly works as single-page, client-side experiences. Every page in the catalog is shaped that way, which keeps each tool fast to load and easy to recommend in a single link.
IndexedDB Viewer fits the gap where opening a desktop app feels heavy and writing a script feels overkill. The page handles the common web and productivity utility task with sensible defaults so a single visit usually completes the job; for highly specialised work, a dedicated desktop application can offer more knobs to turn.
Tips from users who reach for IndexedDB Viewer regularly: process one input first to confirm the settings produce what you expect before committing to a batch; treat the page as the working surface and avoid leaving large jobs running in a backgrounded tab where the browser may throttle JavaScript; and if a particular file fails, check whether the source is intact by opening it in its native viewer — most "tool errors" are actually input errors.
If IndexedDB Viewer appears to hang, the engine is almost certainly still working — large inputs simply take longer to process inside a browser than they would on a server with multi-core scheduling. For inputs near the 0 MB cap, give it up to a minute on a typical laptop before assuming something is stuck.
That is the whole tool. Use IndexedDB Viewer for as long as it stays useful to you, and if it does, the catalog has many more tools built the same way. Each applies the same single-purpose discipline, so the way you used this page transfers to the next one you try.
How it works
- 1Land on the IndexedDB Viewer page. The tool is ready to use the moment the page renders.
- 2Select the web utility file you want to process — drag-and-drop and the file picker both work.
- 3Tweak the controls if the defaults are not quite right for your input. The options are kept short and labelled in plain language.
- 4Trigger processing. standard browser APIs reads your input, applies the transformation, and writes the result back into the page.
- 5Save the output when it is ready.
- 6Re-run with different settings as often as you want. Each run produces a fresh output and the original file on disk is never modified.
Common use cases
- Validate a setting before circulating it to a team using IndexedDB Viewer.
- Compare two product variations side by side.
- Generate a campaign asset in seconds for a quick test.
- Run a fast accessibility check before publishing.
- Run a one-off check during a meeting without context-switching.
- Plan content without paying for a SaaS dashboard.
- Generate a temporary asset for a social post.
- Create a placeholder image for a wireframe.
- Audit a marketing page before launch.
FAQ
How to export?
Use the browser DevTools Application tab or an export library like idb-export-import.
Expected JSON format?
An object with optional dbName, version, and stores array. Each store has name and records array.
Large databases?
Record previews are limited to the first 5 entries per store. Full data is available in the JSON.
Private?
Yes — parsing runs locally.
Schema info?
Key path and store names are displayed if present in the export.
Capacity?
IndexedDB can store much more than localStorage — typically 50% of available disk space.
What permissions does IndexedDB Viewer need to function?
IndexedDB Viewer only needs the standard web platform — file picker access for the inputs you choose to load, and optionally clipboard access if you copy the result rather than downloading it. There is no microphone, camera, geolocation or background-permission request, because none of those are needed for the work the tool does.
Does IndexedDB Viewer require a browser extension or plug-in?
No installation is needed. IndexedDB Viewer runs as a normal web page, with no browser extension, no native helper, and no separate desktop client to download. That is partly a privacy choice — extensions can request broad permissions, while a regular page is sandboxed by default — and partly a convenience one: you can use IndexedDB Viewer on any computer you have temporary access to without leaving anything installed on it.
Is IndexedDB Viewer lossless?
IndexedDB Viewer is built to preserve quality wherever the underlying web utility format allows it. Operations that are mathematically lossless (e.g. structural transformations, lossless re-encoding) round-trip with no perceptible change. Operations that involve a lossy codec inevitably introduce small artefacts at the byte level, but the defaults aim at the sweet spot where output looks or sounds the same to a normal viewer or listener while still being meaningfully smaller or faster than the input.
How is IndexedDB Viewer different from desktop apps that do the same thing?
Desktop apps usually have more advanced features but require installation, maintenance and (often) a licence. Paid online tools are convenient but route your file through their servers and gate downloads behind accounts. IndexedDB Viewer sits in between: free, instant, and private, but intentionally narrow in scope. For one-off jobs and the common web and productivity utility operations, it is usually the lowest-friction choice; for highly specialised work, a dedicated app is still the right answer.
Are there any hidden fees with IndexedDB Viewer?
IndexedDB Viewer is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.
How long does IndexedDB Viewer take to process a file?
Most jobs finish in seconds. Speed scales with input size and with how many CPU cycles your browser tab has available — the engine runs in your browser, so it shares resources with whatever else you have open. For inputs near the 0 MB ceiling, expect anywhere from a few seconds to roughly a minute on a typical laptop. Closing other heavy tabs noticeably speeds things up.
Why did IndexedDB Viewer reject my input?
Failures usually fall into one of three buckets: the input is in an unsupported format, the input is over the size cap, or the input is structurally malformed (a truncated download, a partial export, or a stream the engine does not recognise). The first two are easy to confirm — check that your file is in a supported format and that it is below 0 MB. For the third, opening the file in its native viewer first is the fastest way to confirm the source is intact.
Is the source for IndexedDB Viewer available?
IndexedDB Viewer is a static page running an open-source engine in your browser, so a typical corporate firewall does not get in the way as long as it allows JavaScript to load from Favtoo. For teams that need to host it themselves on an internal network, the underlying engine (standard browser APIs) is open-source and can be packaged into a private build with the same behaviour. Reach out via the Contact page if that is something you are exploring.
Will IndexedDB Viewer keep working if my Wi-Fi drops mid-task?
Once the page is loaded, IndexedDB Viewer can complete jobs without an active internet connection — the engine is bundled with the page, so there is no per-job network call. The initial page load does require a connection (to fetch the static assets), but after that you can disconnect entirely and the tool will still work. This is a side-effect of the local-first architecture, not a deliberate "offline mode" feature.