Help & answers
Everything you need to know about opening, querying and exporting data in a private, 100% client-side viewer — from file-size limits to SQL, formats, pricing and compliance.
OmniGrid is a privacy-first, browser-based data viewer built on a Rust engine compiled to WebAssembly. It opens CSV, JSON, Excel, Parquet and log files and processes them entirely on your device — so the answers below all share one theme: your data stays with you. If you are new here, the fastest way to understand OmniGrid is toopen the app and drop in a file.
The single most common question is whether files are safe to open. OmniGrid is a 100% client-side tool: it makes zero network requests for your data, performs no uploads, and has no server that could receive your file. Instead, a WebAssembly build of a Rust engine reads and analyzes everything locally, inside your browser tab, at near-native speed. This is fundamentally different from cloud spreadsheet tools that transmit your file to a backend before you can see a single row — a distinction we cover on ourOmniGrid vs cloud tools comparison.
Because nothing is transmitted, OmniGrid is a strong fit for sensitive data governed by HIPAA, GDPR or PCI requirements. The tool never puts your records on a wire; that said, it is not itself a certified compliance product, and real-world compliance still depends on your own device and environment. If that is your use case, start with theHIPAA CSV viewer andGDPR data analysis pages.
OmniGrid is designed for files that break ordinary tools. On Pro there is no file-size cap: a streaming architecture reads multi-gigabyte files in chunks and stores them in IndexedDB, so a 10 GB+ CSV opens without exhausting your RAM. All of that parsing runs inside a Web Worker, keeping the interface responsive while the engine works — the UI never freezes, even mid-query.
If your recurring pain is a spreadsheet app choking on a huge export, the open large CSV guide walks through how the streaming and IndexedDB pipeline handles files that Excel simply cannot.
Viewing rows is only the start. Pro adds a full in-browser SQL query engine — aggregates, joins and window functions — that runs against your file locally, with no database server anywhere in the picture. When you are done, data export to CSV or JSON lets you save filtered or transformed results straight to your device.
AI insights, also on Pro, let you ask natural-language questions about a dataset on a bring-your-own-API-key basis. Only the content you explicitly send for analysis leaves the browser, and it travels through your own provider key — there is no OmniGrid server relaying it. Compared with tools that require uploading a full dataset to a vendor before any analysis, this keeps you in control of exactly what, if anything, is shared.
There is nothing to install and no desktop client to manage. OmniGrid runs in any modern browser — Chrome, Firefox, Safari and Edge — and the same WebAssembly engine behaves consistently across all of them. You can open the app and start viewing a CSV in seconds.
Pricing is deliberately simple: the free tier is genuinely free for CSV files up to 50 MB and 10,000 rows, while Pro is $19/month or $190/year for unlimited size, unlimited rows, SQL, every supported format, export and AI insights. The full comparison lives on thepricing page. Ready to try it? You canopen OmniGrid right now and load a file without signing up.
Yes. OmniGrid is a 100% client-side data viewer — every file you open is parsed and analyzed entirely inside your own browser. No data ever leaves your device: there are no uploads, no servers processing your file, and zero network requests for the data itself. Your spreadsheets, logs and exports never touch our infrastructure because there is nothing to send them to.
OmniGrid runs on a Rust engine compiled to WebAssembly (WASM) that executes directly in the browser tab. When you drop a file in, the WASM engine reads and processes it locally at near-native speed. Because the heavy lifting happens on your machine rather than a backend, the tool keeps working even when your file contains information you would never want to upload anywhere.
On the Pro tier there is no file-size limit — OmniGrid handles 10 GB+ files through a streaming architecture that processes data in chunks and stores them in your browser’s IndexedDB, so you are never limited by available RAM. The free tier supports files up to 50 MB and displays up to 10,000 rows.
OmniGrid opens CSV, JSON, Excel (.xlsx and .xls), Parquet and log files. The free tier is CSV-only; Excel, JSON, Parquet and log support are included with Pro. See the pricing page for the full breakdown of what each tier includes.
Yes, on the Pro tier. OmniGrid includes a full in-browser SQL query engine that runs aggregates, joins and window functions against your file — all locally, with no database server involved. It is ideal for slicing large datasets, building summaries and answering ad-hoc questions without exporting anything to another tool.
OmniGrid is free to use for CSV files up to 50 MB with up to 10,000 rows displayed. Pro is $19/month or $190/year and unlocks unlimited file size, unlimited row display, the full SQL query engine, Excel/JSON/Parquet/log support, data export and AI insights. Full details are on the pricing page.
Because OmniGrid never transmits your data — everything is processed locally in the browser — it is well suited to working with sensitive information governed by HIPAA, GDPR or PCI constraints. The tool itself makes no network requests with your file, which removes a major class of exposure. Note that OmniGrid is not a certified compliance product; overall compliance still depends on your own device, browser and environment. See our HIPAA CSV viewer and GDPR data analysis pages for more.
OmniGrid works in any modern browser — Chrome, Firefox, Safari and Edge — with no install and no extensions. It is a web app, so you simply open it and start working. The same WebAssembly engine runs consistently across all supported browsers.
Large files are read through a streaming pipeline: instead of loading an entire multi-gigabyte file into memory, OmniGrid processes it in chunks and persists them to IndexedDB in your browser. All parsing runs inside a Web Worker, so the WASM engine can crunch a 10 GB file while the interface stays responsive and never freezes.
No. OmniGrid isolates all data processing in a Web Worker separate from the UI thread. That means scrolling, sorting and querying stay smooth even during heavy work, because the interface is never blocked waiting on the engine.
AI insights (a Pro feature) let you ask natural-language questions about your dataset. It works on a bring-your-own-API-key basis: you supply your own AI provider key, and only the specific content you choose to send for analysis leaves the browser through your key. The rest of OmniGrid remains fully local — there is no OmniGrid server in the loop.
Yes. Pro includes data export to CSV and JSON, so you can filter, query or transform a file locally and then save the result. Exports are generated in the browser and downloaded directly to your device.
The free tier is genuinely free and requires no payment to open CSV files up to 50 MB with up to 10,000 rows displayed. There is no trial countdown on that tier. Pro exists for people who need unlimited file sizes, SQL, more formats, export and AI insights; if the free tier covers your needs, you can keep using it.
No install is required — OmniGrid runs entirely in the browser, so you just open the app and drop in a file. Because processing is local, you can start viewing a CSV immediately without setting up any backend or desktop software.
Free to start. No account, no upload, no waiting.